Your argument is valid, and I think it is cool being an overthinker, the secret is learning how to be one but integrate it to other one's components and use it to achieve that which others might not since with the overthinking brain many perspectives about a situation are more apparent than they are to an average thinker so in a way I think if harnessed it can be a gift, but in those cases where it is not one amounts to nothing but dreams which remain as such.