I expect that being genuinely deaf is quite a burden to those with the condition. I do have some hearing loss and tinnitus, but not enough to warrant a hearing aid, and aside from a few minor difficulties, I get by just fine.
However, there are times when being intentionally deaf is a (private) joy. Last year I splashed out on Bose noise cancelling earphones.
Aside from time on a large cigar tube at 35,000ft, these earphones are really handy for being intentionally deaf.
I do this most often when sloping off to the pub for a lunchtime pint, alone, works laptop at my side. Earphones in, power on.... ah, far quieter.... then crank up the music of the moment.
Privacy in a pubic place. Priceless.