I think it's sad to see that player progression loop didn't improve in PoE 2
I want to obtain most of my player power without trading. Trading is lame. I want to trade for niche things or penultimate things when I find something omega rare.
The gameplay loop we've seen repeatedly in PoE 1 of - Farm for currency > Buy Item for almost every upgrade - isn't fun. That's the current state of the PoE 2 after the campaign.
The combination of scarcity, difficulty and a very RNG crafting system basically makes trading a must and it's not only unfun, its' boring.