How does clothing harm a child? What fear response is produced from putting clothes on a child? I mentioned unnatural in the sense that restricting your breathing creates an appropriate innate fear response because it indicates death might imminent just like pain. Now, explain to me how you make a 2 year old understand why you're partially smothering them for a virus that has extremely low chances of doing ANY damage to them. That IS psychological abuse imo.
Clothes also unnaturally restrict movement and make one feel constrained. Hence there being a spectrum of comfort from formal/workwear to sweatpants/pajamas, and jokes about working from home with no pants. Children don't react against wearing clothes (as much) because they've become accustomed to wearing them, and nobody says that a child taking their pants off in the middle of the grocery store demonstrates "psychological abuse".
When a child can't emotionally handle wearing a mask, they're likely taking a cue from their parent reacting similarly. And nobody is getting "thrown off airlines" because their child took off a mask as they worked to get it back on - they're likely refusing to keep control of their child, or throwing a tantrum right along with them.
I've seen too many histrionic comments saying masks make it "hard to breathe" to take any of them seriously. Plenty of trades wear masks for hours at a time - eg surgeons, construction, auto body. That narrative ignores the benefits of wearing a mask, while blowing the burden out of proportion. Anything can be made to seem prohibitively burdensome when one shirks personal responsibility.