A $3k+ keyboard in a soft case?
On your head be it, my friend...
I know, I know... everyone is going to say they've never had any damage to their keyboard lugging it around. Until that one day... Like the one last year or so when I got rear ended at 90mph by a drunk in a minivan. Sliced the rear of the car off, but the keyboard in its' hard case survived.
Life is short... Play hard