I agree - this also makes them difficult to flex from toe to heel. However, if you thin them too much, you run the risk of fracturimg them. I’ve come to the conclusion that most woods need a liner that provides the linear strength to support flexing. A good example is Wenge veneer - in the photo below I used it even though the burl had been stabilised. The grain runs along the length on the inside scale and supports the grain of the burl which runs in different directions.Biggest problem with scales in wood: more often than not they are made too thick and chunky looking.
I know exactly how you feel.View attachment 70202
I never use liners but after a mishap involving karelian burl I am now more careful when choosing burl for scales. (cracked already before peening when polishing)