The question was "if you're wildly successful at something with significant real world influence, why would you care so strongly about something as relatively inconsequential as a board game or a video game?"

You kind of answered the question yourself. He cares so much because he is successful in something else and has extended that need for success into other areas of his life. It seems this is common among successful people, they try to be successful in everything else in their lives, perhaps not realizing they might have got lucky in one area and are convinced they can apply that to all other areas of their lives.

Be concise, be upfront about what you want to say, don't make your readers work hard to understand what you're trying to say.

Your readers will also tell you about your content's quality and relevance through their visits. Check your site visits, understand if they're one time visitors or returning and figure out why that's happening.

You might also want to get a domain for your blog, it projects more of a commitment than a subdomain.