That is why I proposed the dedicated single-channel frequency plan (all the way at the top)
To jump into your car-analogy, I think it’s good to realize that in LoRaWAN-world, a single-channel gateway looks like this:
You indeed get the feeling that you’re learning to drive, but your technique will be completely different.
Sure, we can build a dedicated road network for these half-cars, because you wouldn’t want these things driving on the highway next to all those expensive cars, and damaging the road.
Also, when the drivers switch to an expensive car they will have to learn how to drive all over again, because the rules are completely different now.