If settling your insecurities without harming anyone makes you confident, what's wrong ? People go to much more lengths to feel comfortable under their skin.
Really nothing wrong with it. Why should we be judging as long as she is happy with it ?
The psychosocial impact of aesthetic improvement is MASSIVE. Proven through multiple research. Infact you find impact on almost every scenario of life, including economic, perception by self, perception by others etc. There are multiple studies using validated questionnaires which substantiate this (and questionnaires need around a million USD or more just to get validated for trial use).