Thanks for checking out my presentation.
In my opinion, no two product marketing job descriptions are the same as no two products - or companies for that matter - are exactly the same. From what I've seen, product marketers usually start in either marketing or product and get drawn to the other. There are also a handful of people who'd started out in sales and made the transition to product marketing.
Given that product marketing is still in relatively early days as a discipline/function - esp. in Asia, I'd say that there is no traditional career path (yet). Most people in product marketing, including myself, have come to it from other disciplines and other functions, which I honestly think makes somebody more successful in product marketing. By nature, it’s one of the most cross-functional, cross-disciplinary roles you could choose. So having come from other focus areas gives me the perspective I need to be successful in the role - I think!
For what it's worth, my 'initial' educational background covers disciplines like Integrated Marketing Communications, Journalism, Business, Psychology and Research. Once I started working (primarily in strategic, creative and digital marketing agencies), I've taken up courses in areas such as Product Strategy, Design Thinking, and Digital Transformation as I think they complement my varied interests and help me be more empathetic to people/stakeholders from different departments/functions and sectors.
If your passion lies in product marketing, I'd say go ahead and forge a path towards it! You're never too old to learn and try your hands at it. All the best!