My experience is very different. A junior should be spending >90% of their time coding, a mid level about 75% and a senior about the same. It only really splits after that point. But the senior spending 25% more time on the wrong thing is worse than than them spending 25% less time on the right thing.

It’s only when you get to “lead” (as in people manager) or staff (as in tech unblocked) you should spend the rest of your time improving the productivity of someone who spends more of their time coding than you do.