It does say that one feature you’re listing is not really sensible to use without the Enterprise Edition, but you’re right, it does not say that. Original comment redacted.
Even in case you care about regulatory compliance, there are other options besides Enterprise Edition.
If I'm understanding it correctly, page-level encryption is to protect against someone gaining access to the DB server and copying the files off it. If the key is stored in a file on this DB server, I might as well not bother encrypting the pages.