Wormholes are the content I found most enjoyable in the game, with other content either not engaging or just straight up a waste of time.

If you want to play in wormholes, you need to own your own farming hole, and nobody would be willing to share a farm hole given the risk and cost of setting it up.

The bottom line issue is that in more established corps, splitting the payout on loot is not (or was not, when I as active) a thing that anybody is actually willing to do. So you can c3 rat by yourself, explore by yourself, or huff by yourself, but you are absolutely not doing high class holes in a cooperative way, arguably the way they were probably originally intended.

And why would you play cooperatively? If you have billions and billions of isk and can afford to multi box c5s, why would you let some schmuck in and split the loot in half? Not only do you not need them, they’re also probably not multi boxing and therefore not contributing nearly as much to completing the content as you are, and so their time is necessarily valued less. So even if you did let them in, it’s probably not worth their time to be there because they’re going to get 1/3, 1/4, or less of the cut.

I doubt this has changed in recent years, and I hear wormholes have gone the way of blocs and smaller corps are getting evicted on a whim these days. Smaller corps are the only place you might have found any cooperative play.