Sorry about this. Please let engineers know how you feel here.
As to why this occurred, I believe this specific issue goes back to the original rewrite of Premiere Pro when OS X was first released. Former Engineering Manager, David McGavran (now CEO of Maxon) spoke about the challenge of this fete on a public video in the past. The team was under time pressure to get the OS X version done. Software engineering scheduling is pretty brutal, if you were not aware of that.
Personally, I think it's about time that the PC and Mac versions were on par regarding effects, though. You have a great point. That's why I think a feature request would be great. I will upvote and advocate on your behalf. My apologies for this.