Sorry but that's complete nonsense, a nyloc is essentially the same as an ordinary nut except for the top portion of it which is undersized in nylon or polymer which is why they need to be completely threaded on. They have as much chance of stripping as an ordinary nut as long as it is properly torqued which is zero and only need 1 1/2 bolt diameters of a thread for it to acquire it's maximum strength.
If you really don't like the idea of nylocks try Aerotight nuts which can be more reliably reused.
Lastly do you really think the likes of Meyle would use such a component on a critical part without having complete confidence in it? If there was the slightest risk they'd get sued from pillar to post.