It would be odd to not have HR involved in hiring imo. When I was hiring for my team I was happy HR was involved, I gauged technical ability + fit for the team, HR gauged general fit with the company. We'd then have a chat afterwards to compare and see whether we would move forward with the candidate, and honestly the opinions were always along the same lines. It took some of the responsibility off my back knowing that the candidate received the green light from an independent party as well.