I find that most of my drone footage is Ok with a high shutter speed and no filter. If you're mainly just flying high above everything then most motion within the shot is minimal in terms of noticing motion blur or the jittery effect because all people and cars in the shot are so small. But for the times when you want to be a little closer to ground or have normal motion like cars moving or even people and other things, then it's good to have filters to keep your shutter speed lower. Also, the motion of your drone itself isn't impacted much by a high or low shutter speed (typically) because the things moving in the frame (or rather the frame moving about the things really) are far away. It's really for close objects when you're flying ground level with actual moving subjects that you will probably prefer a lower shutter speed (ie: 1/60 at 30fps).
I got the filters from DJI and am still testing them out to decide if I really like them (IDK if sometimes they make the image too soft but I have to test it some more and look online what other people's experience is like). But for $30 or whatever they were, it was worth it to test them out. Now I'm trying to find ND filters for my galaxy S8 with my Osmo!