Comments upthread were concerned that your least-common-denominator, I-watch-the-news-so-I'll-know-what-to-say, effort-free regurgitation of status quo platitudes has received upvotes on HN. This concern was deepened for parent comment once an actual conversation started and you had nothing to say in support of the proposition you had stated with such vehemence. If you're not going to expend the effort to think about a topic, please also save the effort required to post about the topic.
Do you mean the judgment of people like Samantha Power, Anne-Marie Slaughter, Henry Kissinger, Susan Rice, and Biden's foreign policy team which is largely inspired by and contiguous with that set?
Why is the US interested in Europe at all? Whatever the reason, it's clear that failing to secure the Eastern Flank, even if there is no particular interest in Central and Eastern Europe (though there most certainly is), puts the rest of Europe in danger. A tangible example of this threat was the Polish-Soviet War of 1919-1920 (had the Poles lost, the Soviets would have marched right into Germany and probably beyond). The North European Plain is not exactly untraversable or empty of important East/West and North/South trade routes (it is the geographic center of Europe, remember).