When the society missteps, it's the youth who first fall sideways.

When the society missteps, the youths are the first to fall sideways.

You're not to be around people who understand your weaknesses, but rather those will not put you in circumstances that bring out your weaknesses. It's basic logic that your weakness is another person's strength or opportunity.

Knowing that your weakness could be another person's strength or opportunity, it follows that you're not to be around people by virtue of them understanding your weaknesses, but rather by virtue of them not creating circumstances that bring out your weaknesses.