Personally I thought opening doors was about the only thing they did—never seen them engage in any other activity. I am not sure you provide a counter-argument

Personally I thought opening doors was about the only thing they did—never seen them engage in any other activity. I am not sure you provide a counter-argument, IMO offering more people a way to earn money and do something useful (as opposed to delegating these duties to [generally foreign-made] equipment) as a way of maintaining a healthy society still holds.