There basically aren't any properly transit served and walkable areas in Sacramento. Closest would be Midtown and Richmond Grove, but they aren't really very good at all compared to neighborhoods in cities with actual infrastructure.
But despite that they are _still_ some of the most expensive neighborhoods in the area on a cost to sq foot basis. The trend of walkable transit served areas being in high demand is near universal across the US.
edit: comment not commit
I will break it down for you. The original poster said 'most expensive' not the 'most expensive on a per-sq-ft basis'. You are arbitrarily adding the words on a per-sq-ft basis because you FEEL like its much more useful. You provide 0 evidence to support this.
For example here is evidence that most people besides you feel that total cost is a much more important and useful metric. The follow sites selling homes list total cost as the main metric NOT the price per sq foot: https://www.zillow.com/ https://www.realtor.com/ https://www.movoto.com/ https://www.redfin.com/ https://www.trulia.com/ https://www.homes.com/
Edit: Here are the top three sites on google when you search "most expensive areas to live in the us". A three seems to use median home price not median price per sq ft. https://www.rocketmortgage.com/learn/most-expensive-cities-i... https://realestate.usnews.com/places/rankings/most-expensive... https://www.investopedia.com/articles/personal-finance/08091...
Never forget that most statements, especially imprecise ones like the one you quoted can be interpreted in many ways. It is very easy to find an interpretation that is incorrect, especially if you disagree with/dislike the premise.
The reason I say this is that your single example didn't seem to disprove the statement in my eyes. I read the statement as meaning that walkable neighborhoods are in most cases in much higher demand than other neighborhoods in the same region.
I don't really think either of us is wrong, more that the imprecision of the statement and language in general can be unfortunate and cause disagreement.
Also note that nobody will ever respond well to being accused of a logical fallacy. They are useful to understand what is happening and to rile people up. Not so much to convince anyone (that doesn't already agree with you) about anything.