People are offering to pay for it because they understand that providing that feature would potentially cause lost revenue for Call of Duty, since (theoretically) players are buying skins so other players can see them.

I imagine there are a lot of potential solutions (I can think of a few at least) but Activision probably think the lowest risk is to do nothing.

You’re such an inspiration

As well as Xbox and Switch according to the trailer

You could play Ghost Recon: Wildlands or try some of the older Ghost Recon or Delta force games. Some of the weapons on offer are older in it.

There’s a tag on Steam named coop campaign that might help find a few for you. I saw a real time tactics game called War Mongrels that might be of interest though it’s obviously not a shooter.

Also, obviously there’s “hell let loose” but it’s not a campaign experience

I got this scar on my face cause the first game was such a struggle

Monkey Island has aged like a dairy farmer

I recently discovered shadow tactics which has similar mechanics but with a samurai theme. Quite a cool game.

There is also the more recently released shadow gambit which has a pirate theme.

This is some impressive knowledge. How do you know all this?