The one who is accused of the crime

Perhaps the entire prohibition against marrying the current convert is based on the fact that the conversion was for the sake of marriage and would be a disgrace to her and/or him. But while it is not defined as a disgrace, there is no such ruling at all.
Let people say what they will. In our times, it is not shameful and fundamentally inappropriate to impose a rule that initially should not be worn or that one should not convert.
 
What does the rabbi think about that?