Cuz it fucking sucks and is the worse for spam/scams/nothing that ever matters.
What’s to like about having to check a digital mail box every day/week/month/year?
Discussion
I have been starting to refuse service or accounts for companies that require email or phone number. Thats why I love Nostr. Just give ME the key pair. Stop asking for MY info.
This is the way
Perhaps another reason why people don't use email anymore; me personally I use it all the time but I know it's dead for many people.