[villaumbrosia]

First of all, no, It's not uncommon for someone with a CS degree to transition into a Product Management role. And to answer your question about “how come so many people seem to get there without it” I can say that the reason behind that is because PM is not just about developing or designing, but also about communicating effectively with users and many different stakeholders to gain multiple perspectives. And while you may have an advantage because of your technical background, great leadership and other soft skills are required to be an excellent PM, as explained in Product Mindset https://bit.ly/2CgpDtc

As for the way you should market yourself, you should remember that while many candidates have had vast educational and work experience in the business world, not as many speak the language of computer science. Not to mention have a business background as you do as well. So, what you should do is sell the fact that you know how to do both.