Under this model it's not about trying or not trying, but rather if you ever chose to try that's already a made decision, in other words if you ever tried to get better or "will" in the future you've already made the choice to get better, it's not like not being "better" whatever that means is irrelevant, it just means it's an immutable choice, in other words it already is happening, choices in your future are all being done now and it's not like your past is in the past, all your choices of the past are also happening now, it's just in this now that you experience and in all other nows you only have memories of your past. So if you made the choice to be better that's set in stone and if you didn't that's set in stone, but you can't make any choice without being faced with the ability to make a choice, in other words you still feel the need to try to make a choice but whatever outcome is already done by you, it's not like trying is irrelevant it's more like if you fucked up and come to regret it you can't undo it and this is true for your future as well as your past, if you looked at the model and thought what a perfect excuse to not make x or y choice, that's already set in stone. You're not absolved of your choices, but it's rather that this version of now that is experiencing your now simply can't ever change any of the choices made already or that you were going to make, you're simply not aware of what your future looks like and you can't make a different choice about it, but it is already happening in the now, in other words you can't change what is coming to you, and all that you've chosen is being chosen now all at once. Even if it is all already written, your choices do matter, which is why you're making them all now. So it's not like trying to be "better" whatever that means is irrelevant, it's just that whether you actually stick to that choice, or come to regret it, or achieve it, or give up on it, whatever that is, it's already happening and you're just not aware of it in the now that you experience. Like a slider on the youtube video, the video exists fully written but you can only see the slice you are on without being able to skip ahead, even if you could skip ahead you'd only change what you see instead of actually changing what is happening in the video, the only other difference from this analogy is that every frame of the video is playing at the same time rather than how an actual video works where you move from frame to frame, it's more like each frame is its own video and they all play all at once. And this is why your choices are not just relevant but infinitely relevant, because for as long as the block universe exists, everything happens now, ever made a choice that you regretted? Well it's not like the past is the past and the worst is over, you're still doing it, still experiencing it, over and over and over and over for as long as this universe exists for reasons no one knows, on the other hands everything that you experienced or chose that made you love existing in that now is still happening all at once, effectively your choices are infinitely important because they dictate whether you live in a torture chamber or heaven for as long as the universe exists, the only problem is you have no control or ability to change any of them, so while your choice are crucial, you're as I keep saying already doing them. And for that reason yes, being better not only matters but should be the most valuable thing on your mind at all times of your NOW. Of course there is a problem with this model and that is quantum mechanics, so whether we live in a block universe or whether it's all being a block of the past being written by constant collapses in the now, it's currently unclear and no one knows ... but yeah hopefully this shows to you how infinitely more important making the correct choices is, even though you're already doing all of them.

Congradulations! Are you a professor?

Prove it!

There is no such English as British English. Not a thing!

Though I omit the "s" in speech, I do see how it is strange that one may say they do mathematics but shorten it to math without the plural. Would "maths" not be the more correct shortening? Well, that seems like an issue of culture and as such it should not be limited by one's opinion.