Erm.

Everyone is different. So who are we to judge if someone is doing his/her best or using the best method to do something?

Like, maybe taking the bus works for you. You think it's less crowded and brings you to your destination faster,
but another person may choose to take the MRT or even walk. Yeah, walk. Why? Maybe for the exercise? Or to look at the scenery?

Fine. Maybe you see very clearly that your way is better, but sometimes people just have their reasons for doing something. You will never know what's actually going on in someone's head.

Well, there are exceptions - situations when the person actually wants your opinion. If not, don't force it on others.

Ok bye.