>>211487633 (OP)Practical effects guys worked constantly in the 80s because computer animation was in its absolute infancy
They had a ton of experience and were way better than their modern constituents -- any Hollywood job that has been replaced by greenscreens has gotten so much worse. Costumes, set design, practical effects -- it's because they're not getting the same kind of experience.
There's just less decently budgeted work for them these days, so you get people who don't know what they're doing, glorified cosplayers.
Go look up the credits of the guys who did the make-up on Star Trek or made monsters in 80s movies and you'll see they just worked constantly, tens of thousands of hours of experience on the job.