I am a (retired) student of discourse and longtime racer and fan, so here's my take on Rogla and the DNS.
There are two competing positions circulating now. 1/ He selfishly took himself out of a race he could have completed, abandoning Jonas in yellow, to focus on his next objective. 2/ He rode himself through days of enormous pain and suffering, thereby contributing greatly to Jonas's prospects for yellow in Paris, but finally reached a breaking point.
In the absence of medical reports, insider info, performance data, etc, which one you choose reflects your prior feelings about Rogla, JV, the sanctity of the TdF and its 'warrior' culture, and so on.
As a longtime fan of Rogla, I choose Number 2. But to be honest, I must admit I don't really know. Neither does the "loser" school of Philippa, Hincapie, Mikel Bjerg (lecturing a Grand Tour champ, really?), and the rest of that ilk.