Would you tell a slave to just focus on responsibility? Why would you tell someone working for a wage something similar? It doesn't seem hedonistic to me to want to enjoy the fruits of your own labour, or see your community made better by the work you did. Instead a lot of the value of your labour is siphoned off by people you will never meet and only have negative feelings for.
I think different humans have different goals, and as long as those goals don't infringe on others, that's perfectly fine. So you wanting to take on responsibility (in whatever way that means for you) is totally chill.
The issue with the current system is that the goals of business owners (the ruling class), infringe upon others, and those other people would prefer to have a system that doesn't do that, so that everyone can more freely try to achieve their goals without being exploited by a minority of others.
Farming is literally seasonal work. Meaning no, you don't do it every day. The main events are planting and harvesting.
true happiness is reached through responsibility.
Your main point could just as easily be used to defend capitalism - ie. Paying your bills. Can you get more specific about how I can use responsibility to create happiness in my life?