I think Harvey will get a conviction, no matter how good a lawyer is they can only bend the law so much and by the sheer number of allegations and details he isn't likely to get away with it all. The guy had sexual-harassment waivers in a lot of the contracts with actresses which certainly suggests intention, I don't know about in the USA but in Australia it would still be illegal for example. The point that statistically rape allegations are often viewed indifferently in cases of regular citizens is accurate and I've seen it quite often with people I know, but Harvey isn't a regular citizen. His looks aren't going to help either, even from a simple psychological perspective from those undertaking criminal investigation and involved in the court process are less likely to be lenient towards old ugly white men.
Also I agree with your traffic tickets and marijuana offence point, but both of those are issue relating to government and the legislature, they have absolutely nothing to do with the courts, prosecutors or police. They're only following what the government has legislated, if you want to end the excesses of black men in prison for drug offences, we need to legalise marijuana, not attack police for doing their job. Same with the traffic tickets; decrease the size of government and government expenses if you think this is a problem, but 95% of the country are too left-wing and greedy to accept what that reduction in government revenue would mean for them in regards to various forms of handouts and government spending.