Because $1200 for a video card just wasn't enough. Unlike the RTX 2080 Ti, it offers a fully functional GPU, with neither compute units nor a memory channel disabled. It also sports 24 GB of memory. No word on whether it will escape the horrible failure rates that have plagued the RTX 2080 Ti.
If you're buying a gaming GPU soon on an infinite budget, this is probably the one you want. And on a budget slightly less than infinite, you should dismiss it out of hand as way too expensive.