Are you willing to get the Covid vaccine when offered?

Which it can prevent an infection. Not always. But it does. The probability of infection based on exposure goes down after vaccination, and later boosting.
The thing is, in the PDF that was linked shows that majority of the cases are among the vaccinated. I know the percentage of population vaccinated plays a factor in the numbers but those high numbers are still in place.

So you're saying that rather than just vaccinate kids once the vaccine is determined safe for their age group, we should instead take each child on a case by case basis and determine if their particular underlying issues warrants the protection of a vaccine?

And so that begs the question, are you assuming that we will be 100% correct in determining which kids to vaccinate and which kids not to vaccinate?

And assuming you recognize that that is impossible, it now brings me to the next group of kids you've decided are collateral damage - the kids we think are healthy but have underlying issues that haven't yet been detected or aren't deemed risky enough to warrant a vaccine.

Or we could just vaccinate all the kids and not have this problem.
That being said, those who regularly take their kids to the pediatrician would have an idea of any issues that could possibly be in place. Also, just as adults, those who are overweight have a higher propensity for those issues. It wouldn't be impossible and the fact is, the ones that are solely against vaccines or taking their kids to the doctor wouldn't be interested in vaccinating the kids anyway.

You speak of collateral damage but how do you view the 18 and under group that will have adverse effects (and already have) based on widespread vaccination of children?