The map of NATO’s “expansion” to the East you posted misses an important point.
Those eastern European countries became NATO members only after being brutally OCCUPIED by the Soviet Union - for decades!
Evidently when Russia lost the Cold War and finally withdrew from its previously colonized eastern EU countries - Eastern Europe ASKED to be protected by NATO - in case Russia had the intention to invade again...
As we all see ... If Ukraine had been in NATO it wouldn’t have been invaded today!
The NATO expansion to the East is not a choice by NATO. It was those Eastern countries who demanded that - in order to repel any renewed Russian aggression.
You failed to mention this, and it changes the whole perspective.
It's none of our concern.