Yes, it would be good if these contents could be taught in a way that makes them relevant to actual societal questions to make sure people use these concepts outisde the classroom.
The farmer and the engineer don’t only farm and engineer but also vote, consume and discuss their views with others. They should know about consequentialism and deontology to be able to think more clearly about political problems and arguments.
Thanks for sharing your ideas! These might be some ways to start and provide proof of concept and evidence.
On your second point: Do you think teachers or districts would be allowed to adopt a new currciulum someone offered them? In Germany, where I am from, that would hardly be possible.