I'm seeing the irony in the names, JG.
And to be fair (OP), as stated before...you can ride what you want where you want. What I consider my "big bike"...was called a trail bike by local freeriders b/c they use "real" big bikes on FR trails and would use a bike like my Parker on general trail rides.
The marketing hype helps in identifying what type of bike you will need for your intended purpose unless you are a "special needs" kinda person.