No.
The prospects might be more ready to contribute. There is no guarantee there will be a minor league season in 2021, and there is absolutely no guarantee any of them will get better. And really, how many high ceiling prospects do the Sox have above A ball that might be able to step in?
And the FA class for 2022 is really not all that much better, and we only know who is scheduled to be in it, not who will be. The biggest name might be McCullers, but not if Houston extends him. And even if they don't, he has never thrown 130 IP in a season. Exactly how is that class better than one that has the reigning Cy Young winner?
If the Sox take a pass on this year, we will be having this same conversation one year from now, but instead talking about the 2023 free agent class...