If computer use gets good enough (it isn't just yet ... but it is getting better _fast_) then it doesn't matter, you'll be able to browse the sites the same way a human does to bypass whatever shit they want to toss in your way. This makes their business models much more precarious. Also it makes removing the aggregator easier - you could search for the hotels, query their sites directly. Hotels and airlines have been trying to cut out middlemen for years, they just can't afford to lose the inbound traffic/sales it gives them. But the dynamic shifts every 5-10 years in small ways. Maybe this will be a big shift.

That said, even if the equilibrium changes from today (and I think it will) I still share your cynicism that enshittification will ensue in some form. One example right now is the increasing inability to trust any reviews from any service.