I think that at this point, you would have to learn more about probabilities. You're stuck at "I don't understand how having 51% chances to win is better than having 49%, because you cannot know the result in advance and there is a 49% chance that you lose, in which case you have lost".
No, I'm saying it's not clear at all who is in a better position. I'd even argue that the miner hiding his block is in a worse position.
But I'll stop discussing that with you. It's pointless and you're way too condescending.