We technologists will probably be able to circumvent any Signal-ban. But we don't exist in a vacuum, we are a small part of a larger society. Who's at the other end of your conversation?
Most 'regular/normal' people won't and most importantly - don't want to - jump through the technical hoops to keep using Signal.
Although the downside of the official app stores is clear, the alternative might result in a swift return to the '90s and '00s where malware and viruses were rampant. Pick your poison.
