That is, unfortunately, correct. Additionally, there is the issue of badger blondes. Seriously. An incredible amount of badger knots from China direct have been dyed blonde to increase the price. If you think you can get a real two band knot for less than $50, think again. I happen to have followed the purchase price for Chinese badger hair in high quality, and it has risen dramatically over the last three years.
And peroxide does funny things to hairs. For example, it makes them a lot softer. But if you take a Chinese import "super $INSERTFAVOURITEBUZZWORDS high $WHATEVER $AREAWHEREHUNTINGHASBEENILLEGALFORYEARS" knot and compare it to a Thäter, Shavemac or Rooney, you will notice the difference.
And since longevity was an issue, one should keep in mind that chemically treating hairs with peroxide makes them brittle, too. Just like water that is too hot, or aggressive cleaners like Borax.
Get a Thäter, and it will last for decades if properly treated. Thäter have been in business for more than a century, and I have seen some of their brushes from the 80s and 90s. Still in good shape. My go-to brush, a 26mm two-band fan (thank you kindly, Lynn) has seen almost daily use for six years now without any noticeable effect.