There are many reasons why these women did not report anything at he time. Seagal was powerful and they were not . In a dispute with Seagal about what happened he had money, prestige and a loyal fan base to support him. They did not and obviously many would not believe them.
Now the times have changed. Women are finding their voice and through supporting each other find the strength to stand up and state what happened to them.
I do not know the truth if these allegations . That is for the police and courts to work out.
I do know that we should not dismiss their claims out of hand and Seagal's dealing with this mess leaves much to be desired.