How important is a professional email address for a freelancer?

I've noticed that it's quite cumbersome to set up a professional email address. For example, it involves purchasing and maintaining a domain. I'm testing a service aimed at simplifying this process: https://vanity.services/?utm_source=producthuntmakers&utm_medium=linkshare&utm_campaign=pre-dev-v4 Would appreciate your feedback about the landing page and your experience / opinion about setting up a professional email address.