High prices for seemingly simple pieces of metal to get high precision is standard procedure in the tech camera world. However, I have noticed that in some cases you despite a high price can get a product which has precision problems. I've never seen the other way around though, i e cheap product with high precision.
So high precision certainly costs, but a high price is unfortunately not a guarantee for that it is delivered.
Not seldom it is design or mounting that fails. I've seen cases with excellent parts with excellent precision, but a hopeless design that has inherent issues with precision. I've also seen cases when excellent parts are poorly mounted or mounted together with other parts of poor precision.
So if you get a product where design, manufacturing, and mounting all favours high precision you should consider yourself lucky
Actually, I've started to appriciate these things just for that... a totally play-free mechanical system with high precision throughout is almost like experiencing art.