Sounds great. Unfortunately, that would be a niche game. Except for smaller audiences on PC, gamers now won’t play games because they are fun. If they aren’t “earning” something (guns, character skins, hats, gun skins, emotes, dances, perks, boosts, streaks, etc.), they’ll say the have no reason to play anymore.
The RPG-ification of shooters in the late 2000s/early 2010s, coupled with kids growing up with grindy mobile games, rewired gamers’ brains. Now the meta game (the progression system) is more important than the game itself. The live service focus is just a natural outgrowth of that development. After all, if people really only care about earning new things, even if you build a ton of things to grind for into the game, once they burn through that, they’ll stop playing. So of course you have keep giving them new stuff to “earn.”
I wish the world where your proposed game would be a hit still existed. But unfortunately it doesn’t.