[Ant.]

I mean not really?
They are important because you'll need them to get into college, but not that important
Like my college only required a few Bs and Cs which is like, manageable
But of course your chosen college may not offer you a certain course/certain courses if you don't reach a certain grade in a particular subject (we needed a 7 for Further Maths for example)

Also it depends on whether or not you want to be on the High Achievers programme at colleges. You need a lot of A*s (8s/9s in your case) for this and it the programme differs between colleges and some colleges don't offer it, and it's not even anything fancy, at our college they do push all the HA to apply to Unis early but that's it, High Achievers is only really tailored to people who want to go to Uni so if you're not interested in Uni I guess there's no point in pushing for a majority of A*s in that case

We also had to achieve a certain number of As/A*s to be able to do 4 A Levels too I believe? The rules will change for colleges obviously but I imagine this will be similar across the board

Also given the fact I haven't yet applied to Unis I can't speak for this, but I don't know any Unis that care for GCSEs (excluding a pass in English Lang/Maths/Science) as they focus on your A Levels/BTECs/Personal Statement (or so I'm led to believe)
That said, Medicine and Dentistry do have certain GCSE requirements. I think some of them require a 6 in Maths and English? I can't speak for all degrees but it's worth looking at some degrees you want to do (and the minimum requirements for your ideal courses at college)

This was an incoherent mess but honestly? GCSEs don't matter generally, but that said you're gonna need good grades under certain scenarios

Are you sitting your GCSEs this year, or next year? Even this time last year I'd say I was in your situation, but come the actual GCSEs I found myself not actually revising