I guess. There's a lot of details we don't know that would change the calculus on this.

To use a analogous workflow, it could be like saying, "It's pointless to shoot video in 10-bit log if it's going to be displayed on Rec.709 at 8-bits." It completely leaves out available transforms and manipulations in HDR that do have a noticeable impact even when SDR is the target.

Again, we can't know if it's important given the information that's available, but we can't know if it's pointless either.