Companies that pays a salary for someone to work on 3d visualizations can also afford to pay epic for a subscription, it doesn't change anything fundamental its just a small extra fee for the company/contractor.

The reason this doesn't work for games is that many games are made by unsalaried hobbyists just playing around, there revenue share is much more reasonable than a per seat cost for both parties. Epic wants to get a part if the game goes big, hobbyists don't want to pay if they make no money.