A closer example is game consoles, whose associated stores also take 30%, and nobody seems to complain about.
I'm not sure what you mean. Every game dev now refers what Steam algorithm gives you "organic sale."
It's difficult for me to really trust this stat though because purchasing decisions are complicated.
Cult-like or not, I find it reasonable to support companies that do things which you agree with. Valve's non-adversarial approach to business (as opposed to many rent-seeking corps these days) probably helps that perception.
Apple is incredibly strict with the content they allow to the point that it feels like a they exclusively cater to children. It’s easier to vibe code the apps that I want under my own developer account because at least I can side load those.
Steam does allow this. But, has recently started restricting some adult content [2].
[1] https://techcrunch.com/2010/04/19/steve-jobs-android-porn/
[2] https://www.gamesindustry.biz/whats-going-on-with-steam-and-...
It's because Valve doesn't routinely screw over developers and gamers. Steam never removed a game from Steam because it could cause "customer confusion" because it was too similar to one of Valve's own games. When Valve released the Steam Deck, they didn't layer on a bunch of trash for "safety", they sold gamers a portable Arch Linux box that, other than running Windows games on Linux, also runs local LLMs, games from GOG, and development environments. You can write games for Steam on a Steam Deck, compile them, and run them. It's the exact opposite of what Apple is doing - Valve offers total control, and you can use it to do awesome stuff without having to pay a tithe to some overlord corporation that thinks they still own hardware that you purchased from them.
Case in point: Steam is taking 30% too. But you've heard much less fuss over it, right? Why? Is it because of players' cult-like behavior around Steam? (probably partially) But more importantly it's because Valve doesn't own Windows and Steam Deck is a far smaller fry.