The problem with email is that it's an email address from 3+ years ago, which means there's a much higher chance of it being out of date - are you still using XxCoolDude67xX from high school?

Consoles area also marketed heavily towards older teenagers and younger adults, who are exactly the ones unlikely to maintain a consistent email address.

And of course if your email provided decides to cut you off, or goes out of business, or you used a university email...