Cycling will struggle in the UK because I recommend being as self sufficient as possible. What a bizarre claim.
There isn't a cycling equivalent of the AA*, and unlike a car, a bicycle is a simple machine, so yes I do advocate that anyone cycling regul;arly should learn at least the basics of roadside repair. My cycle commute is 10 miles each way on country lanes, if I have a mechanical problem I can't repair I have little option other than a long walk home (which has happened once).
Not really. It's the difference between something being a mainstream and a specialist activity. I'm simply making observations about countries where cycling is a default mode of transport. People don't expect to wear specialist clothing, safety gear, carry toolkits with them - they just jump on and go.
As things stand in the UK, yes, of course you need to be able to sort yourself out. But if we want to promote more widespread cycling (because frankly, it makes the roads better for all road users - and you can demonstrate that) then you need to make it accessible for all. And making repairs easy for people who have no ability or desire to carry them out on the roadside is just one small part of it.
Cycle commuting won't be mainstream for a variety of reasons. Firstly, the perception it is dangerous. Secondly, the perception that it is not possible to dress appropriately for the weather, thirdly, it does suck sometimes, fourthly, it requires physical effort, and why bother when you have a combustion engine to do the work, and finally, it is something you have to be interested in. One thing that somewhat irritatres me are the enthusiasts who aggressively push cycling because they can't comprehend why someone would not prefer it to driving (because they are egocentric). If you come across someone like that, just ask them if they would prefer to rent an allotment and grow their own veg instead of using a supermarket.
Cycle commuting is becoming significantly more mainstream in certain parts of the country where investment is being made in genuinely helpful infrastructure to make it so, by people who understand what is required, and where to target. We don't have the cultural relationship with bikes that the Dutch do, or the ubiquitous flat landscapes that they and the Danes do. Our city layouts have been pretty car-centric since the 70s (although this was the case in the Netherlands in the 60s also). But we do have specific places which are perfect for it and, with the right infrastructure, you can see how vast the appetite for it is.
If it's hilly, it's going to be less popular, but there is technology (e-bikes) to help with that, and you get fitter the more you do it. On average, a UK cycle commuter gets wet *7 times* a year, so the weather issue is significantly overstated. And the whole point is that, in countries where it is ubiquitous, it's not something you have to be interested in, any more than you have to be interested in buses, trains or cars to use those modes of transport. It's just something you have to choose as a preferred option on a particular day. Most cyclists also own cars and drive: it's not a lifestyle choice.
So, make it easy, and more will do it. And that benefits everybody. Make secure cycle parking available, and fewer bikes will come on the train. But if that bike's not taken home, you'll need a way to maintain it. So make it easy. You'll see this everywhere in the Netherlands and Denmark, little booths by the cycle cages at major transport points. €5 to fix up your tyre and puncture while you're at work, tighten up your cables, replace all your batteries or sort our your dynamo. Works for them, works for me. No specialist knowledge required, no lifestyle choice, just a way of getting home. One that I happen to enjoy, and that keeps the pies from my waist at that.