Enshitification was coined by Cory Doctrow specifically for the tech space
You're not wrong it was coined this way, but he has referred to the process in other arenas where monopolies exist:
But it’s not just tech that faces the curse of bigness: your bank, your insurer, your beer company, the companies that make your eyeglasses and your athletic shoes — they’ve all run out of lands to conquer, but instead of weeping, they’re taking it out on you, with worse products that cost more.
Enshittification follows monopoly as sure as night follows day.