...I think the argument is that it allows more flexibility when needed...
First rule of photography, move your feet first. Zoom if you have to, or if you want that flattened effect.
A device that can freely move in 3D should rarely, if ever, in my humble opinion, require a zoom lens.
The only reason I can see someone wanting a zoom is to get a closeup while keeping the drone at a distance. Now, I can see a legitimate (non-lascivious) use here. I want to use my Mavic Air for an interview-style function, when I'm walking with someone and recording our voices, while the drone hovers along in front of us capturing the footage.
My microphone drops the sound of the drone at about 15 meters, but at times I'd like the drone to be closer. A zoom would be nice for this purpose.
But that's a very specific vlogging requirement. And I can work around it easily.
As I said, the "need for zoom" is hard to justify for a drone. But the OP will buy what he wants, in the end. Either drone will do just fine, or even an Air would be awesome and cheaper.
So I'm throwing out an argument to give him something to think about.
In the end, it's all about preference, really.