I've never encountered this sort of problem with ANY keyboard I've owned in 30 years, no matter how crappy.
> A good mechanical keyboard can alleviate the fatigue of typing. Users who need to type for a long time can consider it.
This claim seems dubious.
> In theory, a mechanical keyboard can last for 3 to 5 years.
I've yet to have a membrane keyboard actually wear out. I just had my daily driver Logitech solar wireless keyboard that I bought in 2014 finally die, but it was the solar charger circuit that failed, not the keys or membrane (although the paint on the wasd keys were getting pretty damn faded).
> Keyboard wrist rest: some users may feel uncomfortable typing without a palm wrist. This depends on personal needs.
Wrist rests are actually one of the leading causes of RSI due to the extra compression stress they place upon the carpal tunnel.