No that's not what its like. Thats maybe the first week on introducing the kids to the new caregiving situation. Once thats cleared its a lot more manageable.
I'm not saying its easy I'm just saying it isn't what you described.
Right - I'm a parent, and I have kids in daycare, and it's not at all like "a screaming toddler boarding a plane ... times a dozen, eight hours a day, every day". There are moments like that, just like there are moments of incredible frustration in any job, but it's not 24/7.
Kids, more often than not, do a very good job of reasonably listening to their caregivers. It's when they get home and are in their safe space around their parents that they feel more free to act like little hellions, for lack of a better phrase (and I sure love my little hellions, lol). That's not an absolute, sure, but it's a lot more representative of the reality of daycares than "it's constantly screaming toddlers boarding planes".
I'm not saying its easy I'm just saying it isn't what you described.