Not at all. While a marketing degree from a university may help in getting you a job, anyone can participate in writing, advertising, email automation, and more. Marketing is more about how effective and experienced you are, rather than what formal education you have. There are so many courses online, and opportunities to market yourself and run tests with little risk. If you want to learn marketing yourself, look up courses online and start doing things like writing blogs, or promoting your own work. It’s a learning process, even if you do have a degree, so don’t feel discouraged if you feel behind others. Every brand requires a different method of marketing to succeed, so there is no one-size-fits-all that you’re missing out on from a formal education.