you should not be a 10x engineer or whatever, you should be focusing on the vision and ideas and emotions that make your project interesting and beautiful and touching. some of the greatest indie games of all time have absolutely nightmarish codebases because the creator was rightly focused on the player experience
Code that is beautiful, code that is elegant, code that is efficient, code that follows standards, code that is well commented, code that is well organized, is all meaningless if it does not deliver the intended experience.