I think it’s a cool idea but I also know that the nacelles have a safety function of containing the rotor blades in the event of disintegration (e.g. from a bird strike).

If these fans have blades with anywhere near the same kinetic energy, I would be nervous.

Southwest 1380[0] is a case where the cowling didn't quite contain the thrown rotor blade.

They were very lucky that only one person died.

[0] https://en.wikipedia.org/wiki/Southwest_Airlines_Flight_1380

Turboprops have already existed for decades, so perhaps you should already be nervous.