Well, it would seem as if you have seen some "common sense" in regards to METAL cased batteries being unwise in the Inspire 1.
And by that I mean that you are stuck with a very space-hungry battery design (round). You can get much more capacity by utilizing pouch-based LiPo technology. That is why the Mavic Air, Mavic Air 2, Mavic Pro, Mavic 2 Pro/Zoom, Inspire1,
Inspire2, Phantom 4 (all), Phantom 3 and I believe it goes all the way back to Phantom 2 at least for pouch-based LiPo battery cells. Not to Mention the Parrot Anafi, Skydio offerings and the Autel offerings, ALL utilize LiPo pouch-based cells.
I can see the Mavic Mini using a metal cased battery... Why not, it is super-light already, and they were trying to cut costs, and metal-cased LiPo cells are cheaper than the higher capacity pouch-based offerings (which are, quite frankly, viewed as a premium custom-cell option). Luckily, for us consumers, pouch-based LiPo cells have become in so demand they are becoming available via "universal" sizes and offerings.
And to substantiate, again, ALL the manufacturers for high-end products offer ONLY batteries with pouch-based LiPo cells. There is a REASON for that, and it is weight and space. You can get more capacity in a smaller space with less weight with pouch-based LiPo vs round cylindrical metal canister based LiPo cells.
Oh, and I know Tesla uses round metal canister cells, but that is for safety and stability concerns (metal canister cells are a easier "sell" safety-wise for the general public) when you have thousands in one vehicle to provide for its power source. A crash will result in some crushed cells, but more will just breakout and absorb impact better than pouch-based offerings. I read all the technical stuff on that when they came out and it makes a lot of common sense. The same needs do not apply to drones.