This doesn't make sense.
You obviously have this idea that sixth form at school is for academic subjects (which you don't think should be allowed - no one should be allowed to study purely academic subjects, all teens should be forced to study vocational subjects as well) and that FE college is for vocational subjects.
(Which isn't even correct.)
Yet you also think that sixth form shows a lack of ambition?
So you think... that wanting to study purely academic subjects and pursue and academic career eg as a doctor or scientist shows a lack of ambition? That only kids who want to be hairdressers or salespeople have ambition? Is that what you're saying?
Honestly what does it even matter. For most academic kids, A Levels are just a bridge to university, and once you're at university no one remotely gives a shit whether you went to 6th form at a school or a FE college.
What if a bright student who would on the surface be more suited to 6th form actually goes to a lower performing college and performs better there that they would at 6th form ?
If they're bright then they'll get good A Level results and a decent uni place regardless, and once you're at uni no one cares where you studied when you were a kid.
Honestly in the real world the snobbery regarding education is over which university you went to, or whether you went to uni or not. (As well as snobbery and reverse snobbery over private vs state education.)