But why would you equate "lazy" with unethical?

That's already an assumption that could be challenged. We now don't deem someone who's unwilling to work from sun up to sun down in the rice fields as lazy or unethical, but 300 years ago that might have been the case. Why? Because now a few people grow our food so efficiently that most people can afford to be "lazy" and work 40 hours a week in an office job, or at least an air-conditioned job.