Why do small businesses don't usually use social media to engage with customers?

Actually, this is one of the main mistakes nowadays. SMM really works hard for small business. But a lack of time is the main reason, why SB don't use SMM. But as for me, I do my best in Facebook and Instagram. Now I run a Detailing Business. And I recieve about  1000 likes a day. And1 or2 customers come to my boxes daily. 

Thanks for the question.