Absolutely, I read what this new app is trying to do as hide who you have talked to. If your phone does get searched, you ideally don't want people asking "hey, why do you have a disappearing chat with this Journalist who is writing stuff we don't like".

The flip side of that is that Signal has now gotten some traction with the guttural public, so there is (I would think) better plausible deniability having Signal installed than a relatively obscure/new secure messaging app that's for talking to journalists anonymously.