I am sure everyone has a different opinion, but as far as my understanding goes, as long as the sortilege is done right, wether its physical or digital it shouldn't matter.
The key point is the sortilege, in other words, how close to true random the software can get. Newtonian mechanics mean physical decks are also somewhat deterministic. My recommendation is, if you are using digital, use an app that allows you to select the cards face-down. Otherwise it might be too deterministic.
Just my two cents.