Earlier quoted context omitted.
Though I agree with the end effect, the reality is closer to “let’s pay a landscape company to take care of this thing that isn’t our core business” (perfectly rational) and then the landscape company figures out the most cost-effective way to accomplish that. If that lens is correct, asking people to forego landscape services isn’t the right response, but rather to better educate and/or regulate landscaping services…
The choice of landscaping materials and chemicals is ultimately up to the customer. Ideally, people would be aware and care that a landscaping company is needlessly pouring poison all over their property. The best plan would be to design spaces that don’t ‘need’ weedkiller or leaf blowing.
Not true, there are all kinds of regulations. You can't use DDT for insects in basic landscaping, for example. If it had been heavily used in landscaping (not sure it made sense), the solution to DDT's toxic effects wouldn't have been to educate individuals. When there are big negative externalities, the government usually needs to step in.