Yes: The players haven't stopped using steroids, they're just hiding it better.
Let's be honest: just because we've heard less about steroids in the past few years than we did when the media was swirling around Barry Bonds' pursuit for the home run title, doesn't mean that they've gone away. As we saw in the case of the Biogenesis clinic, the strategies for hiding usage have simply become more advanced. When they can pull in lucrative clients like Alex Rodriguez, Melky Cabrera, and Ryan Braun, biochemists like Anthony Bosch will always put in the extra hours to find new ways around MLB's testing methods. Why be optimistic about anti-steroid policies when they're continually being proved to be outdated and ineffective?