Conflict comes with leadership as the sparks fly upward. If you don’t want to deal with conflict, leadership is not your thing. Being a leader is not about IF you will tackle conflict but HOW. In fact, no other ability (other than being able to get results) so shapes people’s careers as the ability to deal with conflict.
We are all very aware that the vast majority of companies prefer to promote from within, especially for the first levels of supervision/management. There are distinct advantages to doing so since the person knows the organization, product, etc. and provides a positive career path for the individual contributor.