Unless you live here with the cheapest electricity on the planet but end replacing PSUs every 3 months or so due to sudden fluctuations and blackouts. At the very least use a "protector" with an adjustable temporal delay, if you can regulate that even better so they don't all restart at the same time when the power goes and returns...
Note this is not about killing the asics, but the psu itself, assuming the PSU is doing its job properly...
If he lives in a "nice" country with a perfectly maintained and above 99.999% guaranteed service, then sure, there is no reason to "waste" your money with those.
I made the assumption anyone with 'bad' power would know better than to run big power hungry devices like these so that didnt really enter my thought process.
The other recommendation would be to buy ihgher end server grade power supplies. If the cheap chinese PSUs are blowing up every 3 months, why not just buy something proper that has protection circuitry built in?