I can't understand your last statement. Are you calling people who have multi-decade boars liars?The poster Buzz at SMF has a Plisson with three decades daily use. I'm sure you'll never find such a long living boar.
FWIW, my father-in-law has used the same no-name boar daily since the mid 1960s. Definitely balding, but still usable.
I also have a 1980s Mondial boar that I got from my brother's father-in-law. He died about 10 years ago and according to my sis-in-law, shaved daily and only had two brushes, so the boar wasn't used daily. It hasn't lost a hair. I have his other brush, a 1980s Mondial badger, and the boar has more handle paint wear.