It sounds like you have less than a passing familiarity with the issue. We have a better understanding of the dangers of invasives and a better regulatory frame

It sounds like you have less than a passing familiarity with the issue. We have a better understanding of the dangers of invasives and a better regulatory framework to control them than we did in the 1700s. We have eradication programs trying to limit or stop the spread of some of the worst species. Most of them are not beneficial crops. Maybe a little too soon to just give up completely?