Yeah, I could have read your post more carefully. Coming from a crappy community has left it's mark and I haven't gotten rid of old habits yet. After reading this thread bit more it seems like there is actually conversation and plenty of good points, which I'm not too used to see.
There might very well be plenty of money to be made in lawn industry, if it is as inefficient as implied, but that would also require either lots of capital, or something that really makes your company stand out in middle of lots of competition.
Not sure how much profit there is to be made, unlike in drug business for example, as manufacturing is cheap af but prices can be brought really high. There is also reason to suspect, that some companies are hiring illegal immigrants way below avg rates, which screws up legit companies a bit.
So gaining capital through ground maintenance might not be easy at all, as your rates should be able to compete with others. Not too attractive for most of the people who could be capable of making something big out of it, but someone who is really passionate about gardening could even try to go for it.
Seems to me that lawn mowing industry in US is where it should be, even if it's not as efficient as it could be if we were robots. It's an job opportunity for people, whom are not too capable of more demanding tasks, and those who are not cutting their own grass will be taken care off.
As for other small businesses, they serve their purpose as well. In current situation it could turn out to be quite dystopic scenario if everything was owned and done by big companies with administrations, that has no bounds to either income or greed. Maybe if there was some limit to earnings of private person, but not for company? It would not deny anyone from achieving a better life or prevent companies from expanding.