Because he would get off for mental illness.
The man is absolutely delusional and a pathological liar.
He has done several interviews where his lies are so easily shown to not be true that it is pathetic.
His claims of black belts in multiple studies has shown to be untrue. The only black belt he has is in akido.
But his claims are wildly above what is known.
Seagal has been a Russian enthusiast for years.
He claims his mother is Russian, she most certainly is not. She was born in Rhode Island, her parents also born in Rhode Island. If Seagal embraced any culture it was Japanese. Where lived and worked for several years.
But, for whatever reason, he likes to pretend he is Russian.