The pro license at ~$2k/year per seat is all you need unless you are making a shitload of money. In which case, you are going to pay ~5k/year per seat.
I last looked into the matter when considering RFP's for government contracts for VR software. Didn't feel like haggling with Unity's sales reps, especially since the government hasn't been the greatest client of late.
All of this is before you get to the Asset Store, which largely seems to assume that gamedevs are the customers. I'd rather not re-read the license agreement for every asset I've bought, but I know for certain that a number of them are explicitly games-only.
I'm also not sure if it's still in the installer, but it used to ask you what you would be using unity for, and I don't remember most of the options, but one of them was "military simulations" or something like that, so they are aware of the possibility