You might. If your potential customers hang out somewhere, it can often be beneficial to be there too.
B2B? LinkedIn needs your presence. Are you targeting 14-year-old kids? You should probably check out TikTok.
You don’t need to be everywhere, doing everything. But most business (though not all!) will benefit being somewhere relevant to their audience, publishing content that adds value and gets them noticed.
If you want to decide if social media is for you, which one to use, and how to make it effective, then book for a consulting session to discuss a social media strategy.