The main problem I have with masks is that you can't read others' facial expressions.
One of my biggest enjoyments at Disney is people watching. Seeing the little boy laughing and joking with his Grandma. Standing in a line watching a toddler edge ever closer to a meltdown and seeing his parents exchange glances saying "we better take a break soon." Observing the surly teen trailing behind his family with his earbuds in, looking too cool for school, and then seeing Winnie the Pooh and handlers come around the corner and breaking into a smile and looking for just a moment like a little kid again. Watching a bored dad see his daughter's face alight when she comes twirling out of BBB and seeing the realization on his face that this was all worth it. The expressions of happy exhaustion on parents' faces as they wrangle their sleepy children back into their strollers after the fireworks to begin the long exodus back to their resort.
Mask kind of dehumanize people a little.
And if I can't see the smiles on my children's faces, I'm not sure it's really worth going.