You can always come to the less technologically advanced country and haggle all you want. I'm in one of those countries right now, and believe me, it's a lot worse when you actually need to do that every time you try to use any service.
After moving there I've started to appreciate a decent, frictionless, fixed price service a lot more.
I find some of these platforms to be far from frictionless. Try doing a basic sort based on price in AirBnb; it does not include the fees in the sorted price making it difficult to find the best deal. Many sites have false reviews that are manipulated to increase their ratings and push an undesirable hotel into a “deal” that hides the actually hotel for instance. Priceline, for example, is no longer the deal that it used to be and many of the actual hotel sites have better prices or match the ones on Priceline.
I mean, yes, there's a lot to improve because of bad actors and review manipulations. But for example, you can find a taxi through Uber relatively easy instead of wasting half an hour finding a driver who will a) get you where you want and b) take what's advertised through Uber instead of 4x-5x of that price.
After moving there I've started to appreciate a decent, frictionless, fixed price service a lot more.