Agreed this isn’t anti car apart from those who need to make it that.
So my idea is that that there are parts of the sidewalk that are uncomfortably and often precariously narrow for those with prams, wheelchairs or unsteady on their feet. So, for the area between The Lordship Pub and the Roundabout, reduce to 3 traffic lanes (2 for driving, 1 bus stop/parking) with the bus/parking to alternate sides so works for both and south bound traffic. The space would have to come from somewhere and that would be current on street parkjng.
The footpath that would make the area more accessible for everyone (not just the 78% / 95% who didn’t drive); so nicer for all (local or travelled) who visit; and would encourage more shopping as would improve the ability for locals to do essential shopping more easily, and provide fewer pinch-points so space to take it slow for those who are wobbly, or are visiting for the vibe and non-essential shopping.
So, Would a nicer place make more people want to visit (and a small percentage use a car needing to park)? Yes. To make that viable would need more parking bays to be timed, while some people live and work on LL, it isn’t suitable for long period parking given the volume of commercial units and resulting foot/vehicle traffic.
While the novelty of a car free day for shopping is high (even regular ones like north cross markets), i think more interesting is how to solve ongoing day-to-day issues.