Of course the entire city of Los Angeles isn't walkable. It's 500 square miles, or over 10x the size of Paris (40 square miles).
But LA has a great many neighborhoods that are very walkable, and it has public transportation connecting all those walkable neighborhoods.
And in response to your spurious claims about Santa Monica: the entirety of the city of Santa Monica is just as walkable as the cities of London and Paris, and definitely more walkable than the outlying neighborhoods like Versailles.
Downtown Los Angeles is also very walkable, and there are tourists who make that walk every day.
But LA has a great many neighborhoods that are very walkable, and it has public transportation connecting all those walkable neighborhoods.
And in response to your spurious claims about Santa Monica: the entirety of the city of Santa Monica is just as walkable as the cities of London and Paris, and definitely more walkable than the outlying neighborhoods like Versailles.
Downtown Los Angeles is also very walkable, and there are tourists who make that walk every day.