Venice beach sure don't look like that anymore...
Nope. Los Angeles was a relatively small city in the early 1920s, compared to New York and Chicago, but it rapidly caught up. In the 1900 Census, population was 102,000; in 1930, 1.2 million.
I don't have any later photos of Venice to compare, but I have a couple of Laguna Beach: one of my grandfather's 1940 Kodachromes, and one I shot with the Rolleiflex in 2018. Even into my childhood in the late 50s/early 60s, Laguna was largely a "summer colony", with most of the population arriving at the end of May and leaving in early September. Pre-WW2, only a few diehards built in the hills above town. Now, the hillsides are covered with houses and the town's crowded year-round.