A net worth millionaire nowadays is just a person who bought a single family home at least 10 years ago. A million bucks is not what it used to be.
Don't they usually take out the primary residence when doing the calculation? It still doesn't mean someone is completely liquid as I'm guessing many people have their money in tax deferred accounts they can't access until old age.
I'm sorry a million dollars is still a huge amount of money for normal people, whether it comes from their home or otherwise.