The problem is that we don’t know whether our encryption is vulnerable to advanced attacks. Cryptographic hash functions actually have a useful lifespan based on the math and the cost of computing. The more time we spend analyzing the math, the more likely we are to find unexpected weaknesses.
Depends on what you mean by "sufficiently" and "encrypted"!
I'm not an expert, but my guess is these are still truly difficult, deep unsolved questions... We don't even know yet if one-way functions exist; and existing modes of analysis increasingly seem insufficient to fully account for the apparent recent successes of this last wave of 'AI' on ostensibly non-convex optimization problems! (Not to mention the debates about the possibility of fundamental physical/computational complexity limits to intelligence explosion, and so forth...)
So who knows at this point; but I think it is still an open question whether a future AI could reasonably 'break' even today's commodity encryption.