It doesn't have to take a ton of brain cycles either. Buy a raised garden bed, fill it with soil, pick out some seeds, water them regularly, periodically check them for disease, etc. Doesn't take much more effort than five minutes a day, usually, beyond the first couple of weeks. If you screw something up one year, try something a bit different next year.
But it doesn't seem to be the norm to have a garden. I only know one couple that have a home garden of the people I know.
[1]: https://extension.illinois.edu/blogs/ilriverhort/2020-08-03-...
That said, we displaced nature with cities, so we can also put some back. Gardens are nice to look at. Plants also help lower the temperature in an area, and at a macro scale, this makes a real difference in a concrete jungle. You can go further and have something like a reed bed sewage system; have the garden work for you, and the planet. Composting is a great way to deal with kitchen scraps which otherwise go to landfill, and, if you're lazy you can do a worm farm instead for similar results.
Life is short, but also can be boring, and they are something to do; to care for, for better or worse. Lastly, growing food in a garden is fulfilling, and a way to save money. It doesn't need to be a huge effort, and can be very fun. We've grown over a dozen leeks last season, get a handful of blueberries every day (very easy to grow blueberries and worth it I'd say) and herbs we like on-demand.
I have a homestead and believe it or not I would never plant anything on the ground. I have great soil but I would also be fighting with the critters, all of whom I feed. Rather I would put everything in an environment controlled geothermal critter-proof greenhouse. That is on my list of things to do but I only get half the year to build anything. The other half of the year everything is covered in snow and ice.
To make a broader observation: arguably one of the keys to a wealthy society is strong laws that protect private property (houses, businesses, etc.), because of just this phenomenon.
I live in a neighborhood filled with beautiful gardens, and I think each one is a labor of love by the homeowner.