It is a decent app, it does what it says. Daddy can’t read your shit until quantum break encryption.
Real question is whether it is a honeypot to make edgelords feelz good. Strong allegation, no doubt but we are also in the grey zone it seems. Based on that, you have to assume, they are farming the info at least to the security apparatus.
That’s my view as well, the only way to know that data isn’t being used for adversarial purposes is not to share it in the first place. I think it’s fine to use Signal as long as it’s an informed choice. The primary issue I have is that people don’t seem to want to accept that Signal collects phone numbers and that this could be used in a nefarious way. It seems to be an ideological stance as opposed to a rational one.