My reaction exactly. This makes sense from different views, first of all, it's a business, you lose your best player for a year (or more) because of a collision, bad for business, really simple. From an entertainment point of view, the same, while the collision at the plate may be an exciting play, is it worth one collision every so often with high risk for injury for both players involved? Or would you rather have stars like Posey playing all year long if they can avoid silly injuries like getting run over at home?
The catching position is hard enough on the body, if you add in the risk of players getting run over, the catching position would become even thinner. It may seem a bit black and white, but would you rather Buster Posey playing as many games as possible in a very valuable position, or would you rather him getting run over and limiting his future not only as a catcher, but also as a player?