That stuff above. Important. Very important.
Also, look. If (generic) you really need a reason other than escapism to ‘let’ people enjoy escapist media, consider this:
In order to work towards a better world than the one that currently exists, humans need to be able to imagine that there could be a better world than the one that currently exists. That’s a whole lot easier to do when you’ve actually seen a version of that better world, even if only a fictional one.
Seeing depictions of marginalized people just happily living their lives harassment free reminds your brain that hate crimes, microaggressions, and general misery are not some inevitable part of the human condition, even for groups who are currently marginalized. They’re a choice that certain people make and certain (many) institutions fail to protect you from. Those people could make different choices. Those institutions could do a better job, or in some cases bother to try at all. Things could be different. Maybe not in the exact same way as depicted in any particular escapist media, but they could be different. Not believing that is a fast track to cynicism and apathy, which is a fast track to accomplishing exactly nothing. Sometimes you just need examples of things not being awful to shore up your determination to make them actually not awful.
The bigots know this, by the way. They absolutely do not want anyone enjoying anything that suggests the people they don’t like could ever live without their harassment, could ever be happy, could ever just live their lives like no one hates them. The bigots hate that things like pro-minority escapist media exist. They want to be inescapable.
I think I remember even hearing of a movie once about a lesbian couple that was banned from the home country of the people who produced it, not because it was about lesbians, but because the lesbians ended up happy. That’s not a possibility they want you to be able to consider. They want the misery that they believe is inherent in marginalized groups’ condition, but which they, in fact, produced, to be taken as an inescapable reality. They want anyone who ever considers anything else, even for a moment, even just for fun, to be silenced.
They don’t want you to be able to escape. They want you to burn out from empathy fatigue. They want you to waste all your energy on infighting. They want you to attack every single person and thing on your own side, to tear every one of them down without them needing to lift a finger. Stop doing their job for them.