HR is a people management function where marketing skills need also to be employed.Employees are your internal customers.You need to sell management expectations reflected in it's vision, mission and policy statements to them and motivate them to buy them and fulfill them.As a hiring manager, you need to find talent in the job market and shall be able to sell a suitable position to him in the company which is no mean job now, given the war for 'talent' in the market. Having netted a talent, you need to sweat daily to keep him in good humour to stay with you through activities called employee engagement and dangling other carrots in the form of rewards and recognition for his performance.
Marketing is a product promotion function where you need to employ people management skills in finding prospective customer, selling products to him(motivate him to buy by telling him how it meets his expectations) and retaining him too to protect your market share as your competitor may at any time snatch him from you.
Now it is only you can decide which one you want to pursue by assessing your passion level for either of them, your likes and dislikes and which one you enjoy doing.
HR & Labour Relations Consultant 20th May 2019 From India, Mumbai