Whoa whoa whoa... I actually agree in general that someone 75kg/165 lbs should be looking for something in the 156 range unless they specifically want to do all park. If they are beginner, then while I prefer that they get something like a 156... they are going so slow it really isn't going to make a difference starting out... if they already have a board, they might as well ride it.
Absolutely. I never implied getting a short board was the end of it. Sure, he/she will absolutely be able to ride the board either way. My point was that, unless you're only gonna jibb, a too short board isn't recommend.
And two or three people decided to misunderstand and be complete dicks about it, instead of reading between the lines and comprehending.
At least OP got what I/we were saying, that's all that matters in the end.