Do you support a NFZ scenario where US pilots will come into direct conflict with Russian pilots? We all know that NATO will establish air superiority because they (the US mostly) possess far superior aerial weaponry. That means downing a lot of Russian planes. How does that not escalate? With Russia's only go-to being its nuclear stockpile.
It could escalate but it also may not. The participants are both incentivized to not allow it to for fear of triggering article 5, which is why it could well work.