For me I buy babies because they are usually a lot cheaper than adults.

I bought a big normal & was told by the breeder that she was "mean" & to be very defensive when around her because she was a breeder, not a pet. Well, my 6yr old daughter walks around with her on her neck all the time, never seen one hint that she is mean.

Story being is maybe people think coming from a breeder that the adults are not handled much & prefer to start out early to avoid having a aggressive pet?

Or even that maybe a lot of buyers at shows are new to keeping snakes & the bigger ones intimidate them?