Ahh yeah - good call. Totally different protocol.
I guess ICMP more closely resembles UDP at the end of the day, but you're absolutely right. I edited out the incorrect UDP reference so that a person reading for the first time will not get misled. Thanks!
Which is also why some poorly configured network devices firewalls will eat pings - if they for example whitelist tcp and udp protocols and drop everything else (yes, that's a bad idea).