Hmmmm, not quite true.

The 1.2 lenses do offer something more than the others in the range. If you are a professional that thing will be in and out of your bag all day so build quality is key, it's weight helps balance the camera better in your hand. This has nothing to do with the optics.

Most people won't use the 1.4 at 1.4 maybe 1.8 or 2 as this is it's sweet spot. However I can tell you from experience that the 1.2 lenses are fully useable at 1.2 and are incredible to use.

I would sum it up in that if you can make images with the 1.2 that will earn you the money back then it's worth it. If not then the 1.4 will be an amazing buy for day to day use.

Edit - I should also point out that the coatings on the 1.2 lenses allow you to shoot into light a lot more effectively. That defiantly makes it worth my money.

Cheers

Cris