There’s no clear glass in the replacable lens frame!

[Kilrah]

Not following your logic. How is that different from using a ND filter?

The ND filter is there for a specific purpose that supercedes the downsides, while the clear one serves no useful purpose?

Hopefully you don’t go 20m/s with you DSLR ?

If you hit something that is susceptible to damage the lens with your drone you've got bigger issues to worry about than the lens.

Also - the clear UV is to protect the lens when wiping sea salt, bugs and dirt off.

Sure, if that applies to you use what's useful.

Anyway the "clear filter vs none" debate has been going on for decades regardless of camera, so whatever. Just good to inform of the downsides for OP to make the best choice based on their use case.

 

[MAvic_South_Oz]

The ND filter is there for a specific purpose that supercedes the downsides, while the clear one serves no useful purpose?

A UV filter now is mostly to protect the main camera lens, but it does help in certain directions (to sun) in making colours more vibrant for photos, and the might help with air pollution / haze a little.
I use an MC-UV in the drones for photos (rare) and NDs for video.
the most important thing is they have that multi coated low reflection glass to reduce 2nd glass effects (reflection, flares, ghosting).