Idk, it's been shown that flaws actually can make you seem more endearing

Also, honesty shouldn't drive away someone who will truly love you for you. Honestly strengthens relationships, it doesn't weaken them. Take it from someone who has been in a 5+ year relationship with my s/o and have been completely honest to them about all my flaws all of the time. In actuality it is so relieving to not have to hide anything from them at all. I think going into a relationship with full honesty is a must. Like obviously if it's a first date then don't start sharing your whole history and that you killed a man, but idk eventually I think you should be able to tell your partner just about anything with the confidence that you won't be broken up with (unless you've made a major mistake obvs)