With enough people doing it, encryption is like vaccination and helps build herd immunity. And also in that there are a few vocal wackos who don’t want their citizens (children) encrypted (vaccinated) because they think it causes terrorism (autism).
Has the rest of the world considered setting up a reverse Great Firewall around the UK to keep them from endangering the rest of the internet yet? The idea of cyberquarantines have come up before, but it used to be about quarantining individual infected users. When a government mandates that everyone must run malware, that seems a legitimate reason to shut the whole country out of the global net.