Thinking critically is a barrier to shipping. It's much better to plunge blindly ahead! When it all falls apart we'll just claim that nobody could have predicted it.
Stop making them and they won't be a point of discussion. Mortgages, student loan debt, startups that solve no real pressing business need other than to make VC firms money, bitcoin (for the moment),etc. It's important to discuss something that features so regularly and seriously in our financial system as bubbles affect all of us in some way or another.