Introduction and motivation
The law as quoted by the OP is reasonably clear, and it applies to the case, as the answers by littleadv and John Bollinger demonstrate.
In an attempt to address a perceived underlying cause of the OP's doubts, this answer tries to expand the scope of the discussion by putting the existing law and its application into a larger context.1 Why does the concept of "terrorism" exist, and why is it punished harshly? Why are some crimes immediately labeled as terrorism while others are not, even though they technically fit the criteria?
Exploring such questions is a matter of legal theory as a branch of philosophy. Borrowing from the University of Oxford's page Jurisprudence and Political Theory, it discusses "the concept and the nature of law", the "essential function or purpose" of the law and "the nature and justification of political authority".
What the rule of law protects
Influencing politics with a gun3 is terrorism; influencing it with money is accepted mode of operation. One violates the rule of law as it is implemented, the other one doesn't, unless you grossly overdo it.
The rule of law protects each individual, which is the main civilizatory achievement of the Modern Age and is widely agreed to be a very good thing. The rule of law also protects the institutions. Whether that is a good thing depends on how well they are working.
If the institutions are not working well, especially if they are partial, they favor people with influence at the cost of everyone else; Marxists would say they are tools of suppression. The rule of law then, in protecting the institutions, protects ongoing injustice. The commercial players in the health system and their beneficiaries, like the murdered CEO, were apparently considered examples for or protagonists of such injustice by the murderer.
Political motivations for breaking the law
It is probably this — justified or unjustified — realization that motivates people to break the rule of law in order to be more assertive in their attempts to influence the institutions or the people whose interests they protect: "They continue to abuse our country for immense profit" ... "Frankly, these parasites simply had it coming."
Self-preservation of the institutions
It is unsurprising that the institutions react swiftly and decisively to squash any such attempt, in an act of pure institutional self-preservation2 as well as the preservation of the minority whose interests they represent. The concept of terrorism is the category which legitimizes such reactions both in the realm of public relations and in the realm of law: It creates the legal framework for the government to abandon regular procedures, in particular protections for the accused, and at the same time publicly legitimizes such transgressions.
A cause of institutional bias
It is also unsurprising that the institutions do not react as swiftly and decisively when the rights of powerless people are violated, for example by systematic discrimination, systematic police violence or systematic disenfranchising of certain groups of constituents, even though such actions would technically meet the terrorism definition. Endangering and intimidating these constituents, who have no power, does not endanger the institutions nor the interests they protect, which is why the institutions have less motivation to stop it. This changes only when the violations become so detrimental to public order (e.g., unchecked violent crime, burglary or looting, or systematic excessive police transgressions) that they start to erode public support for the institutions, thus endangering them and their protected interests.
1 And no, I have not used an LLM to write or edit this, though I take the suspicion as a compliment regarding style and language — as a non-native speaker no less — because LLMs' texts are often well-written. But while the form may lead to doubt, I hope that the content is beyond the "do not hurt anybody's feelings" slime that LLMs would produce.
2 This self-preservation is related to Luhmann's extension of the originally biological concept of autopoiesis to societal systems; the concept that these systems are self-reproducing and maintaining.
3 A note regarding the wording: This word choice (both of "gun" and "money") is deliberate. They are not euphemisms but neutral terms for of a wide range of possible acts involving a gun or involving money. The parallel wording emphasizes that both guns and money are essentially tools. How using either tool as a means of influence is valuated is discussed separately.