Right but RTC and TSN, as sad and wrong as it is, are a staple for most LFS, in the USA at least. Chains, big boxes, and some of the worst LFS all stock them if not year round but regularly.
Brachies are a specialty and among Brachies, only tigs and jurs are common.
So statistics is not in Brachie favor. I'd guess for every 1000-10,000 rtcs and tsns only one Brachie is sold and our hobby is such that, again statistically, we as hobbyists altogether, kill 99.999% of all fish we buy.
Perhaps only 0.001% survives to die of "natural" causes, especially among our beloved large catfish because of how long-lived they are with lifespans of 25-50 years and many perhaps can live a century+. I'd guess 10x more survive into adulthood but it is still a measly 0.01%.