Pushing Google maps to account for parking time

So I've noticed that Google maps always adds walking time into public transport routes, but never accounts for parking and walking when driving.

I like it feel like this gives the impression that public transport is slower, when 9/10 driving with friends we waste a ton of time parking and walking.

If Google maps and Waze showed parking and walking estimates, it would level the playing field and possibly have a dramatic effect on public transport usage.