Should I be counting the km on my shoes even when walking?

I know you’re suppose to buy new shoes every 50km, but should I be tracking the steps I make in my runners from my front door to the end of the driveway?

I was thinking I would start getting in my shoes while in the car and then driving myself into the driveway and starting there so I don’t have to worry about that. And then end my run right at the front door of my car