Truth be known (and it will be, if the Ukrainians can't hold the line by themselves), we need our troops over there, too.
It may not have occurred to some people that WWIII has already started. Russian is at a nadir, right now. Defeating them now can be limited in geographic scope. As the battlefield enlarges, so does the task. And looking at the NATO maps, there are cracks on our side that will rip wide open, if not dealt with soon...Hungary and Slovakia, on Ukraine's western flank. You may not be paying them attention when the magnifying glass is elsewhere, but they've already become putative 'Soviet' states, while NATO members.