call it or no call?

[xxssmen]

I know that all officials have there own philosophy on certain calls, here is one that have been taught to me by a veteran official, player A dribble pass player B.
Player B does a wrap around on player A to knock the ball from behind and do so, but no contact is made from my view.
Even though there is no contact this veteran officials say that its chicken **** d-fense and that 90% of the official will never see contact and we should blow the whistle.
I know I have let alot of those play go because I see no contact although the player always complain of getting hit when they do the wrap around.
I always thought that you can't call what you can't see.
Is this a good philosophy?