Well if you just need to change Steems or SBDs to BTC or whatever coin you want it is perfect. I though that was the idea of the post, looking for places to exchange Steems or SBD... but If what you want is to play in the market yes, you should use one of the markets in the post...
Edit: And since a long time is the only one with the Steem or SBD wallet online all the time.
I see your point. In the title he did say exchanges. Based on the chart at the end I think he meant market but who knows.
Also literally, the basement of @blocktrades house was the place where Steemit was born, they were one of the first to help in the development of Steemit. I knew this in the Steemfest 1 ;) So I will use it as much as I can normally.