We're almost at the stage of our lives where we could manage without a car. It wouldn't be easy but we'd manage.
We don't have any bus routes near us but can walk 10 minutes one direction to a bus and 30 minutes another direction to a choice of buses. We're 7 minutes walk away from a train into city. Which is then only 7 minutes away! On days when I timed it right and the platform was right I could go door to door to work in 15 minutes. Don't work there now.
We walk and cycle as often as we can. I wish electric scooters (the stand on ones) would become legal. That would make such a difference.
Our town is trying to become a twenty minute town (everything in reach on foot/cycle within 20 minutes).
I wish we had better buses too.
Less reliance on cars isn't just about having public transport and cycle lanes. It's about having amenities and activities close by too.
We've been lucky to have activities for the DC that are close by (and car share with other parents) but sometimes matches are much further away!
We had two cars until 2007 and have managed with one since then.
I keep trying to convince my DH that we don't need a car but we've a fully paid 11 plate car that isn't costing us too much to maintain and it makes our lives much more convenient so it's not happening yet.
Yes the infrastructure should be better but as I said earlier it also about have the right amenities and activities nearby too.