I wouldn't say it's for the what if factor.
hypothetically, if I was thinking about this option for myself, i'd go with grafts if I had sensation or not. Why? Because with DI, I'm going to have unavoidable scarring. As a trans person, I'm going to have incongruities with cisgendered people. So why make my chest stand out any more than it has to?
But, then again, I'm someone who thinks being TS is a medical condition, not a means of cultural identification.