Another way to look at it, is not that theories are right/wrong, or true/untrue, but just if they are useful or not. The "block universe" is useful in helping to visualize difficult aspects of relativity, especially when setting up quantitative word problems in relativity. If someone offers a tool that suites my needs better, I'll drop that corded drill and pick up a rechargeable Makita. Newton's law of gravity is flat out wrong, but for most applications it is plenty accurate and way easier than General relativity, so it is still taught and still used. The fact that it doesn't represent reality doesn't matter in the practical sense, it simply has known limitations. I think anyone thinking about this stuff wants to know more about what reality actually is, but that doesn't mean we have to throw away our favorite tools if they are still useful.