I bought my Trek 5200 probably 25 years ago, 'cause that's what Lance rode. But the shop also sold other brands, not only bikes but other stuff too. Now that all stores are corporate, everything in the darn store is Trek. Bikes, shoes, even socks. Not that I can go to a Chevy dealer and also drive a Kia and a Honda.
I bought my last bike at a small LBS will do the same for my next. Trek stores just feel too much like a car dealer.