Twenty-one years ago something happened. I think we can be sure of that. There are credible people who corroborate key portions of her story. Let's put aside the Clinton haters. Their opinions are already set in concrete and this is just one more brick in the wall of hate they have tried to build around Clinton.
Nobody wants to be an apologist for a rapist.
The problem is that a charge made this long after the facts is as impossible to disprove as it is to prove. That is one reason we have a statute of limitations, which sets time limits on how long after an event a charge of wrongdoing can be brought to trial. The existence of such a statue is an acknowledgment that not every wrong can be redressed and that one of the reasons for that is that it is impossible to have a fair trial involving events that happened so far in the past. Witnesses die or move, evidence is lost or destroyed. When it comes to justice, things do not get easier with the passage of time.