Can't wait for 8yo DS to be able to get the vaccine, and neither can he. Yes, many kids don't suffer much illness from covid, but it has become one of the top causes of death for kids in the US (I haven't seen UK figures). As such it seems a no brainer to me to vaccinate kids and prevent further child deaths. By next spring there will be loads of data, so if you're worried, wait and read reputable sources of which there will be much more availabile between now and spring.
Personally, my DS and I will be there like a shot (pun intended) as soon as its opened up for his age group, l same as his older siblings did. If we could get it now, we would. (I have even considered whether it would be feasible to get the jab abroad for him, so he can get it sooner)
Kids are also a reservoir for virus, increasing exposure for older or more vulnerable sectors of the population, and allowing a vehicle for mutations. Why would anyone consider this a good situation if there was an alternative?
As a bonus, there is a suggestion that the risk of vaccine induced myocarditis in this age group is much lower as there is potentially a link between this and high testosterone levels (as seen in puberty). This might explain why young males (late teen, early 20s) seem to be more at risk of that complication.