I think anyone - not just in the field of science or arts - who contributed a great work deserve to be recognized and respected. of course, their name will always be remembered.
The work of a scientist is far complicated than that of 'filmstars' and perhaps, they should be given more attention as what you've said. however, most people would tend to recognize entertainment rather than science. so, when it comes to popularity, 'filmstars' are more remembered.