That's a fairly widely held view in the eastern states, that framing your posture and policy around not provoking Putin is, in fact, provoking him.
The view is that if you vacate a space, he will enter it, if you don't vacate it, he'll stay out - and that goes for policy, not just territory.
I hold that view. I think it also applies to nukes - we in the west tend not to talk about them, we'd far rather talk about our carriers, or tanks or whatever - but old matey-cakes talks about the all the time and parades them through Red Square.
Imv, this reticence to occupy the nuclear space ceeds it to him, which he then exploits.