I can barely run steam and the games I bought on steam at the same time, which is required for most games. Steam disabled certain features and bloated the software – their launcher takes more resources than actual games. AAA games. (From a decade ago, but still.)

Other launchers might be garbage but the bar seems to be pretty low. Only thing anyone can say is “get a better computer” because in their mind that is a great rebuttal to “why is a game tied to a launcher which takes up 4x as many resources as my entire OS?”