I'm sure there are ways to interpret this as: this arbitrary list of things is achievable, the rest is out of your reach. But then it's your job to find out what those things are, the determinism "insight" is useless.

I am familiar with a key difference here:

Some people find nihilism to be demotivating

Some people do not

For me, it helps me remember to try to recognize my privileges, support systems and luck. I respect people that play the cards they are dealt. Any child prodigy with a lot of resources could just as easily done nothing with them, so the nihilistic approach more so helps me not resent people that won a birth lottery and also appreciate what I do before I forget and start giving generic success advice.

"Justice, What's the right thing to do" is one of my favourite books. I'm sure you know it.