I think the chances of the button being lost or unreadable is the real problem.
Aaron Schmidt

Hi Aaron, thanks for your response. I don’t think anyone here is making dramatic blanket statements — if you read the article, I think it’s clear that I’m not saying that all ghost buttons are bad. I agree that a lack of contrast and legibility can be the real culprits, and that designers should be thinking about whether any call to action is easily identifiable, legible and actionable to users. The problem is that there are designers out there that are not designing with that lens in mind. My hope was that by writing this, more designers would be aware of the potential pitfalls and not focus merely on the aesthetic value of ghost buttons.