Your reasoning sounds a little over-binary; both things can be simultaneously true:

1: Attractive people will find dating and securing a relationship easier than unattractive people

2: Physically unattractive people can still be very successful in dating and securing relationships, because there are many other impactful factors besides physical looks

So you can say without lying or deception "it's surprising that [incredibly good looking person] is perpetually single, it should be easy to leverage their looks into a relationship" and also "don't give up just because you're ugly, there are far more important factors to finding a relationship than just your looks".