I realise reading back now I didn't quite word it how I wanted to. So, just to change it up a bit:
My point more was they know what the public want. Or, possibly more accurately, they know how to tell the public what they want. They've monopolised the market, which means they can go 'look, all your options do this, so that means this is what you want'. That's why some things which work abroad don't work in the UK - the public don't want them. But I'm sure if Merlin wanted them to want it, they would eventually want.
Wicker Man / a wooden roller coaster is a good example I think. Merlin didn't want to invest in one, so they found a way to show that (of course, there were people who did want one, and there were plenty of plans for wooden coasters in Merlin parks before Wicker Man). More importantly, I don't think the masses were clambering for a wooden coaster. People wanted pure thrill more for Towers, hence why Smiler came about. But when whatever level of Merlin thinking wooden coasters were a bad changed their mind, the public loved it. I think that's in part down to Merlin being clever enough to know how to get the most of the UK audience and get them to want what they're giving.
I'm not sure I've explained that very well either, mind. But, speaking purely from a business sense, I think Merlin have got it pretty well nailed down. They can herd the masses like sheep, telling them to like what they're doing. It means they can get the most money out of them in the cheapest way possible. That doesn't mean what Merlin is doing is good - they don't always make the best decisions, and you could say they rarely do. I don't like how it affects the parks, but I can still see it as something that they've done really well, even if I don't like it.
I do genuinely think that a large proportion of the public enjoy Merlin's offerings. Merlin can, of course, significantly improve, and I think if they weren't trying to herd the masses like sheep and instead genuinely listen to them, they would be more in touch with the public more organically.