We also have to plan a second escape route for the ground floor and upper floor because we want electric shutters. Not particularly bad (except that the extra cost of 250 euros each annoys me), since the hand crank doesn’t hang around permanently anyway but can be inserted into the designated hole only in an emergency.
What bothers me much more is this madness of regulations: from the inside, the window must be able to be opened at any time, from the outside it is sufficient if a ladder can be leaned against it. That means if my place is on fire, I crank the shutters up but cannot get out of the upper floor uninjured without external help. At least then I have some fresh air.
If you are planning venetian blinds somewhere, you could ask if those would suffice as a second escape route.