You'd be surprised how many people enjoy a piece of media that has politics that are open about things they disagree with, as long as the writing quality makes up for it (see The Boys Season 1 writing quality vs. Season 4 writing quality, both are open about the politics they support, but there's a reason Season 1 was considered a breath of fresh air and cool satire, while Season 4 is just The Boys becoming what they were parodying).

There are a number of ways to try to argue that there are political messages in both Mario and Zelda, but most of their arguments come off as self serving. Stuff like 'support of monarchy', or 'mario is a communist', or because the games are escapist fiction that are very popular and made in a capitalist system, they reinforce capitalism by allowing people a means to escape their material conditions. I know people IRL who make some of these arguments, most of the time they and others say shit about ‘everything being political’ so they can preach about their own politics. This is a tactic used by people outside of mainstream politics as a tool to help try to rally people to their cause, because if people accept everything is political and what they say is true, you should do something.

Honestly the reason why so many people say stuff like 'I don't want politics in my games' and so forth, comes back to many culture war attacks on media, with a common defense of such attacks being ‘everything is political’, so there is no problems with us making X changes to Y IP or making sure Z game has R message. I don’t disagree that there are people who take it too far, or who simply dislike LGBTQ people/ culture, and so on. I am just pointing out a bit of how the argument ‘I don’t want politics in my X’ came about.