@PaddlingLikeADuck
Asking seriously….
Why would anyone choose to teach pupils of secondary school age, which all the challenges that must involve, over the option of teaching much cuter and sweeter 4-10 year old children?
I honestly don’t understand why secondary school age would be someone’s preference?
Toilet training. It's as a general rule far further along with teenagers.
Fewer parents stomping into the playground demanding to 'have it out with' you.
Get to specialise in one or two subjects rather than having to be all things to all people. So no requirement to do PE when the last thing you want to be doing is standing on a field whilst kids run up and down, complain they need a wee, somebody else looked at them funny, need their shoelaces done up or want to go back indoors/don't want to go back indoors and you still have to show a facsimile of enthusiasm for the subject/and no having to slog through fronted adverbials if you'd far rather be teaching a class to play hockey.
The pitch of an unhappy six year old is just at the right level to make you want to drill your own eardrums, compared to an unhappy teenager's grunts and moans.
You only have to deal with somebody having a bad day/being an irritating wotsit for about an hour before they're off to do the same to next teacher, then you won't see them for at least 2 days, compared to being stuck in the same room as them for around thirty hours a week.
Teenagers can be cute, funny, infuriating, remarkably wise, a pain in the fucking arse and you can go from seeing a flicker of wide eyed innocence and joy to seeing the drily funny, knowledgeable, kind and ultimately brilliant adult they will grow into in the course of a lesson. Some of the pithiest one liners I have ever heard have come from the mouths of fifteen year olds.
It's not just childcare with spellings as some seem to think primary is - secondary teaching is also about widening worlds and helping them grow at a time when they are more vulnerable, as it's when they won't have the same protection/support of parents as they should have at age 6 - you're there for their first steps into freedom and true independence becoming an adult, whereas primary are there for their first steps away from their primary carer and becoming a little person in their own right.
A qualified secondary teacher should have no problem changing if they have knowledge of the Year 7 transition. Ofsted look for linking between the key stages - and the expertise of a secondary teacher would be very useful in equipping younger ones for the change in learning, environment and process, just as a qualified primary teacher is often welcomed by secondaries for both nurture classes and for handling the transition from that side.
And the private sector love specialists.