When you say that you don’t want any kind of monetization, does this include server-side monetizing? Not wanting people to profit from withholding features in mods in a fully FOSS game is definitely good, but i think servers should be able to implement features that allow server operators to recuperate the cost of running and moderating servers, perhaps via cosmetic assets, or sponsors at spawn. (The code, but not necessarily the assets, should be FOSS).
Also, I agree that individual mods not having default keybinds is a good way to solve things-but I think modpacks that are intended to be used as standalone games (i.e. not intended to be customized, dont really add “features” just a combination of mods and maybe a questbook or adventure map) should be allowed to use default keybinds. The reason is that new players who are not used to the game, which are also the type of user who would use a modpack rather than adding each mod individually, having to go through tons of configuration menus is wildly overwhelming and usually frustrating. Almost everyone who plays mods goes through a process like this (starts off with vanilla game, later does a modpack, and once is used to it installs mods manually) and I think allowing default settings for modpacks but not mods is a good compromise between 1. having to unbind the keybinds that just don’t work when installing mods and 2. making sure the people who don’t want to sit through menu hell have a simpler way out