Teams that hit the basement don't tend to leave the basement immediately. So you'd expect them to have a few years of higher picks in relatively quick succession.
I think we're just seeing how getting multiple top 5-10 picks can pay dividends 5-10 years down the road. We've seen it with Pittsburgh, Chicago, Boston, Washington, LA, Tampa, Colorado, and now one of Edmonton / Florida. Detroit is really the only cap era cup winner who has done so without the benefit of multiple high draft picks in the preceding ~10 years.