They may with practice be able to fly to minima, although it would be interesting to see how many IMCR pilots have actually flown an approach ti IR minima in reality (rather than just claiming it), when I had an IMCR I flew a thousand hours on it using it as a mini IR and can count the number of MINIMA approaches I did on 1 finger..........
I suspect bose that very, very few IMC rating pilots have flown an ILS all the way down to 200ft...most (and I include myself in this) would not be going flying at all with such a low base because firstly we probably took off from an airfield in the open FIR with no IAP anyway and since we rarely rent aircraft overnight the prospects of getting back again to our 'field' would be almost zero.