In general I would always generate my own keys and NEVER use 3rd party sw, its just too easy on linux on one command line to generate a real good key that your certain that nobody on earth knows other than you.

But, HW random number generators have better uses than generating private keys for new wallets, the best use is as seed generators for finding ( hacking ) lost bitcoins

There are 300M used bitcoin addresses,  you put them into a 8gb bloom filter and on a GPU card you can do 1 billion cycles per second,, so that 8* 10**18 , so you want to make sure your seed is really random while on the hunt; now that is a use for hw random generators such as these devices

I'm fond of RNGONE from czech found on ebay and/or amazon back pre-CONVID

https://github.com/room101-dev/Grand-Ultimate-BTC-Hacker