Although beauty can be pretty helpful at times having deeper thinking or more “brain” as you said is much more convenient especially when applying for universities, jobs, etc. Yes, beauty can acquire you jobs such as modeling or as an influencer but most of these jobs are pretty hard to enter especially if you want to go into a good company that pays well. Now let’s take for example a surgeon, in the world surgeons are needed everywhere so the job isn’t scarce at all. When you have “brains” you’ll be able to acquire these type of jobs easily than those that are hard to obtain. Basically there isn’t much competition when you have brains because people prefer someone more experienced and smart to handle their situations