Oh yeah, Rip was definitely a really good player in his prime, don't get me wrong. There are just certain skill sets that are more valuable than others, hence why Ray has a job and Rip doesn't.
Rip also has had injury problems (and he was never as good of a pure athlete as Ray to begin with), whereas Ray is pretty much the picture of health for a guy approaching 39 (in NBA terms).. almost superhuman