That's the point. If you're willing to overclock, there is no reason to buy any Ryzen other than the 1700. The 1700X and 1800X are completely unattractive.
Every Ryzen overclocks to between 3.9 and 4.0Ghz, and doesn't take a ton of cooling to do it. None of them go higher than that-- even 4.1Ghz is very rare.
As for Ryzen vs. Intel, if you primarily care about gaming go Intel. If you do stuff that benefits from >4 cores (compiling code, compressing video, etc) Ryzen is a very attractive choice.