There are lots of solutions to needing to create an account now. There's social logins, and the prevalence of password managers if you want to use an email and can't remember if you already have a login.
Reddit is easier because you already have an account, but creating an account on a random site has never been easier to do or manage, so it's not that much harder (and importantly, people already do it because not everything is on reddit so it's not "new" to learn how to create an account somewhere).
Reddit is easier because you already have an account, but creating an account on a random site has never been easier to do or manage, so it's not that much harder (and importantly, people already do it because not everything is on reddit so it's not "new" to learn how to create an account somewhere).