There is two concepts to consider, here:
1st, the concept of being able to land. You will go around at MDA if you don't have the required visual cues or if you have them but you cannot make a safe landing. In the situation you describe, you can make a safe landing, it seems..
but...
2nd, the concept of stabilized approach. In IMC, as per ICAO PANS OPS and most regulations, you have to be stabilized by 1,000 ft in IMC. In VMC 500. In this case I assume IMC, so if you happen to come out of clouds near minimums and you have 4 whites, you seem kind of unstabilized, because as you say, you are keeping a high rate of descent and you are still "capturing" the 3º slope. Therefore a Go around is required.