It is normal for girls to care about their appearance. Every girl loves beauty, but the degree of love is different. Of course, as a man, I am skeptical about what you said, because I have a male friend who also thinks that a bottle of liquid foundation for girls is a luxury, 500 yuan. This kind of communication problem belongs to different sexes, so don't be too obsessed with your girlfriend and care too much about your appearance. I think you should be more tolerant. You should know the psychology of girls and be tolerant.
Of course, tolerance is one thing, and it is wrong to ask you to be tolerant blindly. This may make you give in too much, and finally really turn your girlfriend into a vase that pays attention to appearance. So while being tolerant, you should also guide her to do other things. For example, we can volunteer together and participate in public welfare activities together. For example, you can work together to make money, and then travel together. For example, you can do something that interests both of you, such as riding a horse, having a picnic, reading, learning to cook and so on. As long as your life is rich and your girlfriend's time is scattered, naturally she won't spend most of her time dressing up.
If your girlfriend wants plastic surgery, you can give her an example of plastic surgery failure, and you can popularize the consequences of plastic surgery and the necessity of continuous "maintenance" with her. I don't agree with plastic surgery either, but I have met people who want plastic surgery, and some of them really can't handle it. Therefore, we should not just exhort, but take our girlfriend to do something meaningful, so that she can find that there are more important things in life than appearance.
Don't quarrel with your girlfriend just because you feel superficial. Ask her to do something with a forced attitude. If you do this, it will backfire and make your girlfriend more resistant to communicating with you. Besides, you may not have a girlfriend.