Though the term “influencer,” describing what is essentially a social media star, was only added to the Merriam-Webster dictionary in 2019, internet-famous characters have been showing up on TV for years. Often such figures are vain and vapid, subjects of derision. “I Love L.A.” represents something of a turning point in adding depth and dimension to its portrayal of an influencer, the latest evolution in a trajectory that reflects broader feelings about social media and its effect on the culture.