Be careful trying to draw political conclusions from migration data, because it tells an economic story.
The migration data you cite says that the people leaving California are generally lower-income households without higher education. The people entering California tend to be highly educated and have very well-paying jobs [1]. California's housing stock is more or less fixed; actual housing construction is round-off error to the current population. What's happening is that high-earning immigrants are outbidding lower-income residents for the fixed supply of housing, and then faced with soaring housing costs, those lower-income residents are moving to states where their income places them higher on the social pecking order.
The migration data you cite says that the people leaving California are generally lower-income households without higher education. The people entering California tend to be highly educated and have very well-paying jobs [1]. California's housing stock is more or less fixed; actual housing construction is round-off error to the current population. What's happening is that high-earning immigrants are outbidding lower-income residents for the fixed supply of housing, and then faced with soaring housing costs, those lower-income residents are moving to states where their income places them higher on the social pecking order.
[1] https://www.ppic.org/blog/californias-highly-educated-immigr...