I believe many teenagers would choose to protect their family or decide they don’t need the jab because they have already had Covid. Allowing them the choice also puts them on equal standing with the rest of the adults that choose not to get vaccinated.
Also of note, 12 to 15 year olds in New Zealand can get immunisation, usually at the same time a parent does. https://www.stuff.co.nz/national/politics/126124007/covid19-... (New Zealand has only had a few hundred cases of Covid in the community, so it is interesting that our health services encourage vaccination for teenagers). Edit: https://www.nzherald.co.nz/nz/covid-19-coronavirus-what-righ... says that NZ children can get immunisation or refuse to, regardless of their parents decision, if the child is deemed competent and if they fully understand what is involved in making the decision (the right applies to children of any age).
And the tl;dr sentences from the article are:
> There are three million children in total in this age group across the UK
> 6 million adults who have not even taken up the offer a jab yet [sic]
> Data from the US suggests there are 60 cases of the heart condition for every million second doses given to 12 to 17-year-old boys (compared to eight in one million girls)
> around half of children [sic] in this age group are thought to have had Covid, providing them with natural immunity anyway