> Don't let perfect be the enemy of good.

Better: Don't base your decisions on imaginary scenarios that haven't been relevant for decades.

There's no "good" in blocking ICMP packets and especially ping. You won't protect yourself from DDoS attacks but you might summon some obscure, hard to diagnose networking issues.

If you gave me your IP and your consent, I could rent a DDoS-for-hire service for lunch money and take you offline. They don't rely on their victims taking themselves offline with response packets.