Because if console makers can not "control" the platform there will probably not be future consoles which are a big part of Epic's sales.

Because Epic is doing something much closer to those companies and restraints on what they can do would likely affect Epic as well.

Because they directly negotiate deals with those companies that other smaller players can’t negotiate. The App Store is largely a “these are the rules for everyone” minus a few small exceptions.

Because the three of them are all making their store business decisions outside of CA such that it's far harder to have California law applied to them?