Yes here some people assiduously rake up the leaves (or pay someone to do so) put them in bags and either pile em up by the roadside to be picked up or drop them off at designated municipal locations.
And what does the municipality do with them?
They make mulch! Which is then used to enrich (fertilise) flower beds and lawns! Meanwhile some homeowners go out and buy chemical fertilisers (often imported) for their lawns.
A local and very well respected horticulturalist/broadcaster does not recommend the planting of grass at all. Saying it takes too much care does nothing for the soil and is prone to drought and pests such as the cinch bug! Rather, plant a low growing version of clover; which is bug resistant, survives winter frost well, and returns nitrogen to the soil. So all patching in our front and back is done with clover seed and it fills in very well mixing with whatever grass is there. It's been so wet this fall that mulching the leaves has been well nigh impossible.