Unfortunately, Apple often disagrees. They have tried to make multiple frivolous lawsuits against people doing exactly this, over the years.
Sometimes it doesn't matter what your rights are, if a company is willing to spend a bunch of money trying to submit illegal lawsuits to bankrupt you.
Here you go: https://consumerist.com/2009/02/14/apple-wants-to-make-jailb...
That is a clear example of a bad actor.
Unfortunately, Apple often disagrees. They have tried to make multiple frivolous lawsuits against people doing exactly this, over the years.
Sometimes it doesn't matter what your rights are, if a company is willing to spend a bunch of money trying to submit illegal lawsuits to bankrupt you.