I received this question SO many times when I was away. The answer is not a simple one and I am no expert. The levels of unhoused people on the west coast of the United States currently (2023) is incredibly high. Much higher than elsewhere in the US. This is due to lots of factors, and during our trip I spent a lot of time trying to learn more about it. It's complicated and nuanced and if you decide to visit, I'd urge you to spend some time learning about what's going on there and why. In practical terms, yes, you will see a lot of tents, encampments and unhoused people. If you are uncomfortable seeing that, you may just want to research where you visit, which parts of town etc.