It may be "technically possible" (e.g. by creating spiralling roads and turning them into ramps), but I would still agree with the intent of the statement that it's simply not practical.
As far as the addition of new tanks is concerned - I'm all for it. It needs to be understood however that much of our development - not all of it - is driven, and enabled, by the demands of our military customers. They decide if they need a simulation for their training, they decide if they disclose a tank to eSim Games, and which parts of it. The more access we're granted, the easier it is to create a faithful simulation. Conversely, without access we have to cobble together what we can find in open sources which is often not enough, or at least doesn't allow for a very detailed simulation.
I'd love to have a playable Merkava, but will we ever see one? Unlikely.
The other aspect is available time. Creating a playable tank for which there is no demand outside the Personal Edition invokes not only the costs of researching the vehicle, creating the 3D model, the programming, the testing. It also creates opportunity costs - that we could have worked on something for which we would have been paid, but didn't. That's not to say that we'd never do such a thing - we have a playable BMP-2, T-72M1, Challenger 2, Scimitar, T-55, T-62, BTR-60/70/80/82, BRDM, M1, M1IP, M1A2SEP, the Technical with the recoilless rifle, and more - and for none of these we had a military contract. Still, we need both - a pause in contractual work and the opportunity to investigate a vehicle in order to create a suitable model for you. Should the Polish or the Korean army decide that they need the help of eSim Games to create a K2 MBT crew simulator, we would of course render assistance. I suspect however that this is something for which an American-German company like eSim Games is only third tier, with preference for a Polish or Korean domestic solution.