Conventionally, rent-seeking is a poor quality activity which doesn’t generate any new wealth, it just transfers it.

But that’s not the case here, at least from my perspective, as Apple invests huge amounts in developing their hardware and software and millions of developers around the world (ok, maybe thousands, I don’t know) and their families have benefited from this.

It’s not like they’ve inherited a vast real-estate portfolio that was amassed through violence and war (see British aristocracy, est. 1066) and have invested relatively little into it.

Prior to the 1980s, monopolies were considered bad (or at least extremely dangerous and suspicious) by default, and leveraging one to privilege your entry into another market was a huge no-no (though I'm not sure leveraging a monopoly to create a monopolized adjacent market would always have been seen the same way).

Robert Bork's theory of "consumer harm" as the guiding light of anti-trust enforcement (and further conceiving of "harm" mostly in the form of higher prices, or at least "value for money") has given corporations too much wiggle room and consequently led to a lot of contorted legal and economic arguments, substantially reducing antitrust scrutiny and enforcement (which was the whole point, AFAICT).