Because the TS lens is more than the 24L and the 24L is sharp at f/1.4. Why would I need a TS lens for indoor family shots and indoor family video? That's why it's not a good value, for the OP. For landscape and architecture, you better believe it's a good value. Some part of value has to be based upon need. The 24-70L II can be a good value, but I already own the 16-35L II, 24L, 35L, 50L, 50 1.4, 50 1.8. I'm sure it's a great lens, but has no value to me. Anyways, I recommend, highly, the 24 f/1.4L II to the OP.