I don't think we disagree. If you need secure messaging, go with Signal. I'd agree (with less credentials to back it up compared to people that work in that industry
cough).
I said that for me they are basically equivalent. And for now I pick Telegram as the best compromise I'm going to get (still using my mobile number, still a silo, crappy encryption vs usability and cross-platform/multi-device support).
You seem to say that people should cheer for Signal so that people that NEED the secure messaging features aren't lured into the wrong direction. That makes sense. But if someone reads HN for secure messaging recommendations .. I kinda expect them to read more than a single comment and do a bit of research.
People are pointing out that Signal doesn't satisfy some requirements for their individual needs. It's not a "You shouldn't use Signal" (which would be bad), it's a "You might not like Signal, if .. " listing reasons like federation and identity. In this setting here I think that's fair and reasonable. No harm done, no danger for a random person stumbling upon these discussions and dismissing Signal because a random person online said that it doesn't support federation.
Signal is a nice project, I'd recommend it for everyone that has hard requirements for their secure messaging solution. I still don't want to use it myself and feel that it's fair to point out why Signal cannot cater to everyone. That doesn't harm Signal or its global perception, I think.