Yes and shorter as well. Not everyone is model height regardless of size.

Yes different shapes and sizes! This would reduce the number of returns!!!!!

not just talk skinny, and tall plus-sized - also petite size 10 and 12s, normal sized people.

Recently I purchased two sizes in a dress I loved the look of. I returned them both - the size 14 was HUGE (size 18! at least) in the bodice - there was no way I could remodel it and had to return it along with the size 12 which was a wee bit too tight in the skirt and I couldn't change that either. The model was wearing a size 8.

Have different shaped weather it be tall an thin or big chested modelling the same out fit

Especially for brands that run larger sizes, or plus size brands. It's hard to imagine what they'd look like sometimes when they're on a very small model.