I don't understand what you mean in the end. Are you asking me if I have trouble verifying my account?
About the linking part, like I said, think about it as "could someone online do this without proof that its really me?" Yes, if they do link to their twitter account, and on twitter there is no mention about steemit, any steemit followers, etc. Then yes, anyone online could do this.
But if you on your "verified twitter" account say that "hey I'm doing my intro post on steemit" then we know that its really you the real owner of the other social platform, not someone just linking to a random one pretending to be them.
That was the point of the blogpost.