Most of the other states have not seen the rise in population growth and real estate values seen in CA. There are still places where homes are like 250k or less. There is also way more value drop off outside the metros in most other states with high cost cities such as MA or NY. You could be 30 mins drive from boston in a great 400k home. Try and find that 30 mins out from SF or LA. There just isn't really that fall off in california that you might expect from real estate markets elsewhere. It is like the rising tide has lifted all boats.

To be fair 250K homes and under homes are increasingly uncommon and increasingly undesirable. Rural areas with almost zero industry are averaging out at 600-750K. Maybe a bit of a downward trend, but the average salary in the area is like 50K. so it doesn't matter.