First acknowledge that you have weaknesses, both in skills and in knowledge. Second, admit that you’re ignorance hurts not only the product or website, but the team itself. Third, get help in hiring experts for roles you are not familiar with, and go out of your way to involve them, and their perspective, in your decision making process. Deliberately hire first rate strong willed people to represent disciplines that you tend to undervalue. Force yourself to be on the top of your own game, and to make sure it’s not bias and ignorance that drive you, but good judgment refined by divergent perspectives.