I kind of think the outrage over this is a little more like Disney excluding most of the most well-known Star Wars characters and stories from Galaxy's Edge or popular PatF songs and characters from Tiana's Bayou Adventure in order to serve the backstory. That does result in a more cohesive themed environment, but YMMV as to whether that results in a better theme park land or attraction.
Disney has a kind of loose and silly backstory involving a snowfall in Florida for this park and a massively popular movie set in the snow. Disney banishing characters from that film (or pretty much any film) from the park entirely because everything there has to fit the storyline of a Florida snowstorm would, at least in my view, be another sign they've lost the plot. Particularly as we're just talking about a toddler area.