“I have nothing to hide, I just question your judgement and motives.”
In a world entirely populated by empathetic, decent, and sane people we wouldn’t need much privacy. Unfortunately that’s not the world we live in. There are countless unstable, stupid, and evil people in the world – some of them are in positions of power or might achieve power in the future. They are absolutely the sort to weaponize “harmless” information against you.
Do you want those people to know your sexual preferences, political leanings, etc?
You mean like the “multi-million units sold” Linux based Steam Deck?