To this degree? No. This is not likely.
> We shouldn’t assume anyone’s word without a decent amount of certainty.
Several claims from individuals with corroborating evidence in this case.
> most people making the accusations are doing so long-after the fact, often have outside motivation for making claims
Citation needed. I need evidence that most people making accusations are doing so "long after the fact" AND have motives outside the offending incident to do so.
On a side note: Codes of Conduct and Guidelines have existed long before the modern era. Private entities are free to handle these however they want, and suggesting they leave everything to the courts is a new and unique perspective that needs more backing to suggest it would be a better system.