The problem is a benevolent dictator only lasts part of one lifetime. Then you have to deal with the problem of succession, which in a dictatorship likely means unpredictable chaos
https://in.news.yahoo.com/xi-jinping-undertakes-fresh-round-...
Another thing that doesn't inspire much confidence is looking at Hong Kong. The people there have unambiguously and collectively spoken about their desire to live under this system, often at grave personal risk.