I don't know, a service like ZeroSSL (email/domains, submit, upload verification, submit, that's all) very much simpler than any command line utility, especially for simple tasks, to be done my newbies.

I think you are going to have a tough time convincing the HN crowd that a web GUI is simpler than a CLI utility; it is much more difficult to automate web GUIs than CLI utilities, and doing something like this by hand is going to seem unnecessary, given how rote this sort of task is.