Taking care about others it's not being selfish. Is just to prevent any bad actions regarding some things that they can do, like the examples you gave.
Like always, sometimes we need to "smash with our heads" to learn new lessons, for life. Sometimes we don't need advices, we just need to see what's going to happen if we do the way we want to, even if it will go wrong!
Awesome post to let us think about the way we are and we think!
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