I understand the justification for having restrictions on who can be vaccinated but part of me thinks this is all extremely counterproductive. Yes, old people a

I understand the justification for having restrictions on who can be vaccinated but part of me thinks this is all extremely counterproductive. Yes, old people are at greater risk but also the more young people are vaccinated the harder it is for the virus to spread and the faster we reach herd immunity which also ends up protecting old people. I end up thinking about this great video [1] by CGP Grey where he explains that the most efficient boarding method for an airplane isn't actually front-to-back but just random. Surely if we just said anyone could get a vaccine then we'd be more successful in reaching herd immunity right? Edit: You could also just make a portion of the day for older people only and the rest of the time open it up to everyone. I feel like right now we have the worst of all worlds [1]: https://www.youtube.com/watch?v=oAHbLRjF0vo https://www.youtube.com/watch?v=oAHbLRjF0vo