Maybe you could've framed it better, maybe not *shrugs* - you'll think about it more in future. The fact is that car ownership is a messy knot of privilege, circumstances, and lifestyles. It will vary hugely around the world. And it's entirely possible for something to be both a necessity AND a privilege - because that is the f**ked up world we live in.
I think the main thing your thoughts about this highlight is that public transport, and especially accessible public transport, needs to be up to a higher standard in many places. It certainly does here in the UK, where a lot of disabled people actually *rely* on public transport because they are unable to drive, but where our rail network needs a major overhaul, and is often inaccessible. (Plus, in a country as small as the UK, it should never be cheaper to take an internal flight that to take the train - and yet, here we are.)
I don't know the circumstances of the commenter, but you have to look at where they're coming from too. There's something in the book world called #OwnVoices - where someone who has a marginalisation is the one speaking about that marginalisation. #OwnVoices discussions of, for example, disability experience, are varied, but are valid even when they contradict each other. Sometimes non-#OwnVoices perspectives can take up a position on behalf of a community that that community doesn't necessarily share - which is why listening to #OwnVoices is so important.
...This was an essay again! I swear I meant for this comment to be short! Lol.