Stealing their childhood away, really? It's an article of clothing. My kid objects to wearing pants a whole lot more than he objects to wearing a mask. He still needs to wear pants.
Come to think of it, maybe that's why this is such a huge deal. People have come to think of clothing as a marker of your tribe, and not wearing the expected clothing as social deviancy. That's why wearing a hajib is so triggering for so many Americans, or why guys wearing skirts is an affront against nature (but strangely not in Scotland!), or why folks get killed over wearing gang colors, or why I desperately wanted a denim jacket when I was in 1st grade in the 80s.
And if that's the case, sure, you can have your tribe and I'll have mine, and my kid will wear a mask because that's what the people around him do, and yours won't because that's what the people around her do, and then maybe my tribe will still have ICU units available and yours won't. Okay. But I can assure you that kids in Singapore or Taiwan or now California, where mask-wearing is just accepted, grow up just fine.