So do I, although the attitude of a few lets down the majority.
I think it's important to remember very many of these drivers come from a background of poverty of education, their parents weren't educated, their grandparents weren't educated, education has not been generationally valued in the family.
More often than not, that consigns the next generation to 'local schools' and, later, low paid work. What you see with many black cab drivers is someone quite bright trying to break the cycle.
So doing the knowledge - 3 years, 5 years, whatever - is a route out of the poverty trap for people who didn't enjoy decent education; they can earn semi-skilled and even skilled income levels, at least in the past aspire to own a home, to give the children opportunities, to live a better life.
Contrast with Uber; personally I have never met an Uber driver who could make a living not working a lot of unsocial hours. I'm not sure I've met one who isn't in denial about what they actually earn. What I have met is a surprising number of older men who would rather work for next to nothing - for the dignity of working - than face age discrimination and what they perceive to be the stigma of unemployment.
I have also met many younger family men who need a government 'top up' and just as many other younger men who share a bedroom in dorm-type houses.
It really is very, very tough out there in so many ways for unskilled men in their 50s and 60s. Blacck can prices are high, but they are mostly high relative to the indignity of the silicon valley workplace.