On one end, I feel like security is hard enough that we don't need to go weakening it, in any way, to allow the government to be able to (with a lawful warrant) read the data. I feel like the citizens of the US are overall more secure with end to end encryption that no-one can backdoor.
On the other end, security is hard and we fail in so many other obvious, exploitable ways. Even with mandating that e.g. Apple be able to decrypt the contents of any iPhone it does not actually reduce our security in a meaningful way because there's so many other ways we routinely fail at security.