2 points
The problem is actually further - it’s that they push people to use Signal on mobile.
In the official desktop client, there is no option to register (even though it would likely be not that hard to add a box accepting a verification code), they tell you to use it in the mobile app instead. All while far from all phones can have privacy-respecting OSes installed on them at all.
Yes, there are ways around (Signal-cli or an Android VM - and even then you have to use Molly since the official client requires you to scan a QR rather than following a link). But arbitrarily directing people to a platform that is harder to make private is nonetheless weird.
