If they did not sit there in the first place - ergo, it would not be a problem. So, they would rather do nothing and let a woman in need stand, than risk being turned down. Part of the waiting area, they should not be in in the first place, they should just automatically get up. Courteous considerations should outweigh any potential embarrassment they might feel being turned down. If they are turned down, then they can return to their seat knowing at least they offered and have their seat back.

Not just pinoys - I have never (apart from my husband) see any man of any nationality offer up their seat at this clinic ever!