When Thomson says " Being a good K is being good qua K", it means that we can be anything. We can simply be anything. We should crave for the betterment. If we wish to be an astronaut then we can be an astronaut but being better astronaut matters a lot.
We should not restrict ourselves. W should always try to be good in our associated field. We should simply try our level best efficiencies to be good. "Goodness-Fixing Kinds" says that our goodness should also be utilized. If we are good then its should reflect its impressions.
Being an active good is important as compared to idol good. "Function Kind" also talks about functionality of being good. If someone is good and is not working at all then he/she can not be claimed good.
If we are good by heart then we should not sit and rest. We should become active. We can provide meaning to our life only if we spread goodness of our personality. If we are hiding our goodness then it causes no benefits to society.
It will provide no sense and meaning of humanity. We will have to be active. Acquiring good qualities are not enough. Taking them and utilizing them for good of other people is the more important aspect.