Making too much of it on one hand and
on the other.
If you have your work done professionally, then the tuner/shop might want to stand behind thier work.
There's always a possibility that something may go wrong in the process. Be prepared to deal with it or dont' do it.
On the flip side, I've seen dealerships try everything in the world to get out of correcting a problem that is thiers to begin with.
The duty I believe, will ultimately fall on the dealership to prove that the tune caused or contributed to the failure.
Maybe one could copy thier codes, then convert them back before taking it to the dealer? IDK, I don't know enough about tuning to say?