[wott]

1. It is not a matter of "need", rather a matter of comfort and practicality. (I leave in mountains).

2. I do have half a dozen different types of shoes (something like 1 or 2 pairs of army boots, 1 for cycling, 1 for MB-hiking-gardening, 1 for gardening, 1 pair of tennis shoes to wander in and around the house, and probably 1 old worn spare one I forget about). It doesn't mean I buy them all every year. I haven't bought any in 2017 or 2018. The army boots are 5 to 10 years old, same for the hiking shoes I use for mountain-biking (4 years old?) and gardening (15 years old?), since I cannot really hike any more. The tennis/cycling shoes are dying but they were already dying last year and in fact they are still good enough :-) So I probably buy only 1, perhaps 2 pairs, in an average year.

[doombolt]

It is only a matter of comfort, and not survival, if you own a car and drive it around exclusively. If you own a car, well, impact(car) > impact(any number of pairs of shoes).