Earlier quoted context omitted.
That's a very good question. The problem is what's next if they acknowledge that. Say it is acknowledged as an attack on a NATO member, but nothing is done. That immediately turns NATO's worth from whatever its is worth now, to less than the paper it was printed on in 1999 when the Check Republic joined the organization. That's the achilles heel of NATO, and the Russian government knows it. Same goes for Baltic count…
Since the invasion of Ukraine I think it's pretty clear to everyone involved (and many have been making it publicly and loudly clear) that appeasement doesn't work with Putin. So if any of the Baltics gets invaded for whatever reason, you can bet that a majority of NATO members will join to defend (even traitors in some countries like Hungary, Slovakia, Bulgaria will definitely will try their best to stop their count…
And at each point NATO has to make a decision whether it's "worth it" to escalate into armed conflict over it, and Putin can just keep "bending the stick" until he finds where it's about to snap, and not push any further, while the stick gets a bit weaker and weaker...
I do think the Russians are vulnerable right now in the sense that if they provoked excessively in the fashion they were used to before the invasion of Ukraine, they could open the floodgates to more serious support for Ukraine.