Not really. Any teacher qualified to teach HS math should be able to teach anything up to pre-Calc. If you have more Algebra students ahead of grade level than usual, you shift a teacher away from pre-Algebra and into teaching Algebra I.
That's not what the progressive complain about. But if that is true, the obvious solution is to create more spots.
If the same people wouldn't complain about disparate failure rates, I'd even support making them open enrollment, but weeding people out based on performance. But we all know, people would just claim the classes are racist.