Of course you could and lots of businesses do run their own social media, but it takes up a lot of time. Why spend countless hours a week scrapping together a couple of posts when you can get a team who's expertise is that, to do that for you, after all time is money.
Ultimately, investing in social media management is about leveraging expertise, saving time, and optimizing your online presence to enhance brand awareness, engagement, and overall success in the digital space.