Who really uses cab/taxi services? I grew up in Toronto, Canada (not a big city compare to NYC, but still pretty big) and now lives in SF Bay Area. I took publ

Who really uses cab/taxi services? I grew up in Toronto, Canada (not a big city compare to NYC, but still pretty big) and now lives in SF Bay Area. I took public transportation (sure, they sucks sometimes) , riding bikes, and I own a very basic car (Toyota), I have never really have a need to use a taxi service in probably 17+ yrs of my life so far. I really not sure how this is improving people's life because I don't see a problem with the way I lived now. What are some advantages that I really need a taxi service? Sorry, I don't drink, so no need to worry about drink-and-drive. I would like to see someone here can enlightening me.