inhibitor turrets whats with all the changes

Seriously why did they even make them laser turrets. True they slightly clear waves better but big deal. They offer no support to team fights. Also this new change of making them weaker doesn't help split pushing in all reality. The main reason a team can split push is that a team of four under a tower can hold off a team of five while their teammate back doors. With the new changes the team of five is just going to engage every time and push down the middle for towers and four kills. I mean for heavens sake an adc can tank the towers even a mage, assassin, tanks, and support can tank the towers. Is that not sad to anyone else. I still don't understand why they changed the towers in the first place, a large enough minion wave still kills the towers laser or not.