If by easy you mean the platinum is automatic because you just need to play the game to the end then I would say that arguably the only time a platinum is easy is if the game is piss easy to finish. If you look through the rarity of trophies in any game and find the non-platinum trophy for merely completing the game then you will see that game completion rates are very low. So just getting to the end of a game is a challenge, and therefore there is no reason to be embarrassed for having completed a game, unless you are actually embarrassed to have a permanent record of you having played the game at all.
Maybe there's a case to be made about cross buy multiple platinums. But even then, you still have to play the game fully each time, and just playing a game through to completion multiple times is an achievement in itself.
“The fundamental cause of the trouble is that in the modern world the stupid are cocksure while the intelligent are full of doubt.” - Bertrand Russell
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