How much of someone's proportions is related to their genetic structure? For example it seems like the arm dominant people are always kinda arm dominant, torso dominant are always torso dominant, etc. What I mean is people seem to keep the same general shape regardless of what they put more focus on. Ive been chasing delt/trap dominant proportions (GSP for example, great delts, mediocre chest. Im talking muscle proportion to one another not total size. His delts always overpower his chest. My chest always overpowers my delts even though I try for thr opposite) for many years but is it a waste of time if Im just naturally chest/lat/torso dominant with narrow to medium shoulder width?