In retrospect, yeah. But from a real world perspective, that only happens by happenstance of Toriyama having to change the story as he went along. The original intention was that 19 and 20 be the real threat, and thus had they been stopped before even getting to appear - no story.

And I still sort of feel the same way I did before in an older thread when this topic was brought up once - I can't imagine Goku, the same Goku who decided to let Vegeta go and the same Goku who for some reason decided to give Freeza another chance too, going along with any plan to go kill an old man who in their timeline hasn't done anything yet (at least, in his own words...he kind of probably already
was hard at work at that point, but semantics and Goku never did mix well).
Looking back on it now though, you do raise a good point. There definitely could have been something done with the 'butterfly effect' even more so, rather than it just kind of happening because it happens. And more could have been done with the disagreement between what Goku wanted to do and what the smart thing to do was, instead of just cow-towing to Goku's whims again, but it is what it is.
...Actually, that does bring up one thought though it's going slightly off topic. There was a different thread about a Civil War-esque idea in DB, and this 'split' definitely could have been used for something like that, but more specifically, it could have given us the one fight I'm amazed never actually happened in any medium, Vegeta (who would want the Androids to come out so he could prove his superiority) V.S. Piccolo (who would be more likely to err on the side of caution if needed by comparison).