I don't think you really get it. Until the law is overturned, it's the law and people violating that law will go to prison or be otherwise punished.Leaving it unchallenged doesn't make the law go away, nor does it make it ineffective. The only potential positive would be that other states might be reluctant to do their own bans, but we can already see that this isn't true.
I'll break it down further:
1. Dr. <X> is convicted of performing an abortion.
2. Dr. <X> is sentenced to <Y> years in prison.
Now, right here, with no appeals, Dr. <X> is spending time in prison. Dr. <X> will for good reason find that situation unacceptable and will therefore instruct their attorney(s) to file an appeal on constitutional grounds citing RvW and move on to step 3.
3. The state appeals court will uphold or overturn the conviction.
4a. If upheld, Dr. <X> will appeal to the federal level.
4b. If overturned, the state will appeal to the federal level.
5. The federal district court will affirm or overturn the previous court's decision.
5a/b. Same as above, but the appeal will be to the Supreme Court.
Bottom line: The law has to be fought, not only on principle but because as of this moment the law is unconstitutional as determined in Roe v. Wade.