Ghostflyer,
You're not necessarily right about not compromising safety. Efectively, by using max flex, you put almost all V1 values near to the limit, in terms of EDA remaining. Then, airlines get all uppity and start blaming pilots left, right, and centre, for being incompetent, on the odd occasions when pilots reject and go off the end.
Put another way, if you KNEW you were going to have to reject at V1 on a particular take-off, would you be flexing?