^absolutely right
working to improve communication skills will benefit anyone in every area of their life and working to be more confident will do too
you wanna get promoted? you want people to want to be your friend? you want people to fancy you? improve your communication skills (doing so will in itself improve your confidence, improving your confidence will in itself improve your communication skills)
tying everything together means that you are actually genuinely confident and comfortable with yourself on a deep level and that this comes across in positive, healthy and enjoyable interactions with all people, some of which will probably involve flirting
negging/the pickup scene doesn’t give people this, leading to what _em said
…being an insecure scumbag who has no interest in actually connecting with people on a human level