It's good to ask questions about the shift. It's also good to avoid making claims without evidence to support them.
Over the past couple weeks, Russell Carleton has mounted a mini-attack on the widespread use of the shift in baseball, claiming that while some amount of shifting is surely a good idea, there is evidence that teams have taken it too far. It's a topic that matters to Rays fans, as the Rays are among the teams that shift the most.
The questions he poses, and the majority of both articles, are good, so if you haven't yet, read part one and part two first.