I don’t think anyone is suggesting that. This only relates to how the issue came about, and took time to find a root cause.
The reason we’re only seeing a handful of cases here is because of the relatively small number of installs with the updated gem that also aren’t relaying mail over some form of secured transport.
Richard has already started a topic on the bug:
For anyone who needs this working sooner they can also either enable TLS on their mail server, or temporarily switch to a mail provider which offers a secure transport.