I am understanding it differently, may be because after much deliberation I fell into the same position. I interpret the parent comment to mean that the questions posed are very, very relevant and worth grappling with, but knowing the answers is not a pre-requisite to work in the chosen field.

I don't know about the original commenter, but I fell into this position as being the best for me based on, "I am overwhelmed by the number of things that I need to know to make a judgement of good/bad over here, but don't or cannot know. There is too much random chance in my life to figure out how my actions play out. Until I grow wiser, let me do what that chance has laid my way, knowing fully well that I am operating in the dark."

The big, muddying parameters for me to answer 'is what I am doing right?' were:

1. In what context?

2. Over what timeframe?

The larger the context, the longer the timeframe, the more the number of competing principles I had to prioritize, often in inconsistent ways over different aspects of life. In the end, I defaulted to the original commenter's position, with the blind optimism that I would somehow, somewhere in the future get more clarity and wisdom through experience.