Much like gynaecology benefiting everyone, everyone benefits from high quality cycling infrastructure, if it's good enough that people end up using it & switch their journey from the car (thereby reducing congestion for those who
must drive.)
On a related note, it might be worth looking at why so few women cycle compared to men in Britain. There is
research. (spoiler: it's safety and terrible/nonexistent infrastructure exposing them to unacceptable danger.) Compare to the Netherlands, where more women cycle than men, and the older cohort who'd be twirlies on the first off-peak bus of the day in Britain all go to the shops on their bikes.
That explains the never-used cycle lanes going up and down Soho Lane and Spring/Summer Hill into Birmingham, then! Taking away those lanes from cars and making it so even the buses get stuck in the traffic (where they didn't as badly before) really benefitted everyone!
If your solution is "make it so damned miserable to travel by any other route that arriving to work on a bike knackered, while also being drenched in rain and sweat sounds preferable" is your idea of a solution, I'm afraid we have very different ideas of what a solution entails.
"Dad's taxi" is much less of a thing in the Netherlands. Whereas children in the UK are escorted everywhere, because of dangerous roads and paranoia about child abduction and assault, Dutch kids have great freedom from an early age. Again, this is a consequence of their nationwide cycle network.
Personal experience is slightly different for me, as I was "encouraged" to get a 50cc moped at the age of 16 by my dad.
Granted, he was still in the dying embers of his "middle-aged biker" phase of his life, but I do very much miss that little scooter. At 16, it gave me a lot more freedom than my friends got. However, I will add the caveat that I was considered by not only my own parents, but by the parents of friends that I was, shall we say, "slightly more sensible" than my compatriots, which is probably why my dad trusted me to not wrap myself around a lamppost at 38mph going down the hill.
Not in my experience. By the time that I get to work I'm bright and alert. In fact there's a huge amount of research on the stress-reducing effect of regular exercise. Some people pay a fortune in gym memberships and get up extra early for the same aim. I leave five minutes earlier than I would if driving and save the money.
Having been forced to cycle into my job at Tesco's for a few weeks while at uni when my car's turbo (it was a diesel car, so don't get any ideas about me!) kicked the bucket, it was my own housemates who pointed out that I was suddenly way more short-tempered than usual during that time period; my friends from lectures also indicated that I was zoning out of group sessions way more often than normal. While I noticed neither, I
did notice a dramatic decrease in my energy and vigour at work. All 3 noticed I'd gone "back to normal" after getting my car back.
These days, I work in an office with a free gym in the basement, so I'm hardly fussed on that front. I take the bus in as the parking fees in the city centre are nothing short of daylight robbery, but in the upcoming new year, with fares rising to a level well above what I pay for lunch each day, I may well return to driving in.