It is a good thing, but it can also disrupt many of the natural ecosystem processes that occur. Most pesticides have bad effects for their target populations but also for non-targeted populations. If we can control pests by increasing populations of beneficial predators like ladybugs, they eat the bad pests, and we won't have to use those extra inputs. It saves money for the farmers, and it's better for the environment.
On February 7th, 2018. See this statement in context.