To me the problem lies in the OP's closing words:
I know what i did was wrong but is it that big deal????
Scenario: early solo pilot is on approach and sees another student taking picture while standing on the runway threshold. Thinks, "They'll move in a moment." They don't move. Student pilot freezes for a few seconds wondering what to do. At the last moment self-preservation takes over, pulls up and stalls in from 50 ft. Dead or injured student pilot, destroyed aircraft.
Someone at my club who couldn't see the potentially big deal probably wouldn't be flying for a while.
Of course, this could just be a case of an instructor losing it after a long day, but the OP's attitude worries me.