It sounds good in theory but signal updates are beyond excessive, sometimes multiple times a day but almost certainly every few days.
Most of the time there is zero explanation for the update. They are just training their users to auto accept updates with no thought about why, which in itself is a security risk.
If signal really is pushing these updates for "security" then it must be one of the most insecure apps ever built. I legitimately can't think of another app or program that updates more frequently... Maybe youtube-dl?