I find this particularly fascinating, given the post email world I live in now. I haven't had an email from a contact in over two years. It sounds like a sales tool, in a world where the goal is to distance from that availability.
In my country, e-mail is now used purely as a sales tool. Notifications from government and schools are also delivered via SMS, and either WhatsApp or Telegram. So.. yeah, block everyone.
Turns out the second you do this you eliminate 100% of the spam in your life. Honestly, if I ever lived in North America again, I think I'd also just stop reading e-mail.
Please do not assume that professional email is used differently. Plenty of companies here simply black hole inbound email unless it's from the same domain or known applications. Frankly, it's refreshing.