Actually it's not like you think.

It's OK to use guards for yourself because

1) there are thousands of non-public guards(bridges) 2) you choose the path to the rendezvous point 3) middle nodes don't know the type of the traffic

Also there are a few things wrong with your article.

  And the rendezvous point must be in this list (because you shouldn't have a private rendezvous node).

This is not true. The spec does not specify that.

  Usually Choopa LLC -- a cloud provider that is regularly used by hostile actors.

Choopa LLC is not regularly used by hostile actors. You can't say that citing one report.

  However, the relay, rendezvous, and exit nodes must be publicly known so that lots of Tor traffic will use them.

Not true with rendezvous points.