I understands that you are lonely. But your solution to end loneliness by pursuing married women isn’t productive. To cure loneliness you might want to look for single women, not other men’s wives.

You can’t control what other people do or don’t do. You can only control yourself and your actions.

Also you need to understand that most cheaters don’t leave their spouses. You waste your time.
She doesn’t need help. She cheats on her husband. She might need help of a lawyer if she wants divorce but she likely doesn’t want that or she’d be long divorced

Look for single women

No it’s not impossible. There’s no way you “must” go for a married woman. No such thing