No major disagreement there.
What I'm trying to highlight is the distinction between the struggle for power and the exercise of power. Campaigning for election is a struggle for power. So is purging your political opponents within the government. So is founding a startup.
Governing is the exercise of power. Deporting all immigrants and closing the borders is the exercise of power. "Grab 'em by the pussy" is the exercise of power. Leveraging a monopoly is the exercise of power.
Power struggles are usually looked at favorably by those whose interests align with the ascendant power structure, and unfavorably by those whose interests are entrenched. The naked exercise of power is usually looked at with distrust by everyone, on the theory that if they bully someone else, they could bully you next. There's a fairly wide grey area in-between; for example, I've categorized Trump's immigration orders as the exercise of power (which probably both you and tptacek would agree with), but someone who just lost his job to an immigrant would probably categorize it as a power struggle where Trump is fighting the immigrants oppressing him. And similarly, not everyone would buy your claim that a dictator committing a purge is an "outsider" in his government. The key point though is the relative power differential between parties: it's a struggle for power when the active party is the underdog, and the exercise of power when the active party is dominant.
The way I read Altman's quote, he's casting Trump's campaign in the same terms as the struggle for power that all startups have to go through. He's specifically not endorsing what Trump has done with that power once he attained it.