There's always something coming Real Soon Now that will make BTC work. Segwit. Then 2x (oh, wait, they promised that then reneged). Lightning Network. Etc.
Yes, Wrecked Bitcoin might eventually be made to work reasonably well, if the core devs and the miners can get their act together and stop being short-term greedheads.
But Bitcoin Cash already DOES work the way Bitcoin was intended to work. So why wait around and hope that maybe, just maybe, the core devs and miners will someday extract crania from recta for more than five minutes running?