Why are there more sensitive snowflakes?

An extreme snowflake would be someone that's so sensitive that they want to commit suicide or develops extreme depression just because you said they should work on their diet and are a bit overweight. That's not being harsh nor discriminating anymore. That's someone with problems that can't deal with constructive criticism, isn't ready for the real world and believes everyone should praise him/her, expects to be liked by everyone.

But honestly, why are there more sensitive snowflakes nowadays than in the past?

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If I were crying because someone told me to work on my diet, my parents would tell me to get a life and grow up.
Why are there more sensitive snowflakes?
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