I hear you – Cutgate living up to it’s name I guess 😀
In my experience, I’ve not found UST tyres to be any more robust than non-UST tyres in terms of their sidewalls or indeed pinch flat resistance, which you can still get with tubeless set ups.
Given how much cheaper non UST tyres are, I think they make more sense all round.
If you are having continuous problems with tyres being too fragile, then your best option is to run a dual ply tyre.
Personally, given my weight and riding style, I wouldn’t venture out into the Peak without a dual ply tyre on the rear. I’d chance a single ply on the front though, but without the security of a DH tyre on the back, I can’t ride as I would like.