Do you have any idea how useless modern lawns are for growing anything other than that monoculture green carpet? Rebuilding a real soil system of any depth takes years. It's one reason I use raised beds instead of trying to til nearly dead lawn with only an inch or two of soil under it anyway.

Likewise with planting fruit trees. Most of my fruit trees are a few years away yet from providing any serious harvest though the orange tree may give me a few oranges this year.

This is not something that can be done instantly, overnight or via mail order and a Fedex shipment for tens of millions of people. Then there is the problem of learning your local environment, its pests, its growing season(s) and the oddities thereof.