Okay, my mistake. Let me add my two cents for potential readers then.
I have farmed and used skill injectors in order to help me chase new strats and opportunities, but those skill points would have been worthless had I not known what I was doing. And while I do agree that incomes can scale quite a bit, and that you can skip over the character skill training part, you cannot skip over the player skill training part.
So, yes, I like saving unallocated SP, I have bought skill injectors (with isk), and I have farmed skill injectors for personal use, all to make it easier for to chase new strats and opportunities. And I advise older players to make similar plans to help them to pivot in the case of buffs, nerfs, or new opportunities. However, I strongly advise against new players using skill injectors to “skip the wait”. It’s not going to work out like you think.