To the people who won't hesitate to let their seats to those in need (good Samaritans), I know most of you would prefer to stand rather than grab a seat during MRT ride so that others in need will have a chance to sit. However, there are those who for their convenience sake will take up these seats. The latter won't let their seats for anyone.
Knowing this fact, it is a more proactive way if we take up empty seats firsthand so that in case of someone who need them later, we have the chance to offer these seats rather than relying on other people to do so.
Doing that is more helpful.