I'm generally of the same view. There aren't really walk overs in football anymore, every nation has improved coaching over the last 10 + years, and even the smaller clubs in the lower leagues when we get into the FA Cup rounds prove that notion.
Tunisia were there to make it a very niggly, tight and compact game. But we still carried a threat, I thought we still showed patience. I remember the Iceland game and we couldn't even string two passes together for 60 mins. We deserved to win the match and given that we now have a manager who keeps Harry Kane in the box when we have a corner, we've got a chance.