I have some significant wrinkles on my forehead when I raise my eyebrows and a pretty intense widows peak, but both are basically invisible because I have bangs. The only reason I have them is because I haven't cut my hair significantly in the last year, but they're still bangs! I also have rather curly hair, so that helps with breaking up any lines you might see through them, but I basically leave my forehead untouched when I do my makeup they cover so well. I don't know what that stylist was talking about with bangs not working with a widows peak, because everyone I know has advised me to keep the bangs, hairsylists included, so maybe try a different stylist. You can see what my hair looks like in my post history.

Edit: Wow I just looked back at that picture and my bangs are nowhere to be seen in that photo! Fortunately, neither is my widows peak