Well I'm not an expert but Kevin Finisterre proved DJI had access to all the vital records your tablet has access too and was posting it on unsecure websites. Credit card, driver license, location, images..... you name it they had access to it. Fortunately the US Military dropped DJI in 2017 due to this concern, think the location and images of our armed forces were accessible to the Chinese. DJI as much as fessed up to it and launched the government drone but it's difficult to get confidence back IMO.
Nobody should really be surprised by this, the military and most big companies who deal with China are well aware of this kind of thing. Chinese citizens don't have privacy like we expect here in the US, (not that ours is all that great) But it's been proven many times they think nothing of a collecting data without permission even stealing it which they are very good at. The fact that they purposely attempt to hide some of what's going on in the app tells the true story. Zoom
does similar things and has been called out on it, yet people still use it like crazy
AND it's not been fixed, ether has the DJI app despite plenty of time since the issues were identified.
Given an acceptable choice I'll buy an American product over it's Chinese counterpart. I don't blame DJI as a company, I like to think they are an unwilling participant but that doesn't change anything. The app is an easy fix, you have to ask yourself, why hasn't it been corrected? It's not like they didn't have enough time to bring it into compliance. That's suspicious but again no surprise.
From a national perspective the Chinese want us to buy their products but don't be fooled into thinking they are our friends.