I walked down Market back and forth from New Montgomery to Guerrero every day for work for many years. It is not true that there was some impassable section of Market. Most of the people out on the street were just normal people.

It is true though that there are now places you literally cannot walk down the street because the sidewalk encampments are so thickly settled that there's no space to pass. For example the west side of Folsom between 14th and 15th. They keep clearing the encampment but it just comes right back.