Exactly, the regs are there to try and ensure a landing or an 'early' missed approach. What I am saying though is that if the tower reported visibility is below the required, you are entitled to continue to the OM or equivalent.
If at that position you are actually visual with the runway and your assessment is that you have the required visibility for the approach then you should continue bearing in mind that at ANY point you lose the required visibility you should execute a missed approach whether that be at 900ft or 50ft.