PS None of those 3 motives apply to those countries [like Scandinavia] that consider quality of life more important than profit - explain, please.
Well, first, Scandinavia isn't a country. But if you break out Denmark, Finland, Norway and Sweden, Denmark is slightly less than
two times the size of Massachusetts, Norway is the size of New Mexico, Finland, like Germany, is about the size of Montana (slightly smaller), and Sweden is the size of California. From a infrastructure logistical standpoint, it's much easier to get it done in countries that size. So I'm not sure that I'd categorize what they did as impressively great, as it didn't require a substantial fraction of public funds to accomplish.
Denmark pioneered wind power out of a combination of monetary return and out of fear for survival, with the latter being the primary motivator and the former developing later. They developed wind power in the 1970s because of the oil crisis, due to the fact that 95% of their electricity at the time was either oil based or from coal imports from the outside of Europe. Coal imports became too expensive and there was no domestic oil to speak of, so they had to quickly develop an alternative. Even today more than half the world's wind turbines are produced by Danish manufacturers (Vestas, Siemens Wind Power, etc.).
In Sweden, hydroelectric power accounts for more than half the electric generation. It has been that way for a long, long time, because they have much more hydro resources than they do wood and peat (they have no oil or coal). Nuclear power accounts for 35%. Wind power contributes 2.4% to the total.
In Norway, hydroelectric power accounts for 98% of the electric production. They don't have a lot of lakes to store water, but the height difference of the mountainous regions combined with the abundant rain and snowfall allows for lots of hydro power. What little oil and gas they produce, they use for their own vehicles and then export the rest. They also export most of the hydroelectric power. They get a monetary return on that.
In Finland they have 28% nuclear power, 16% hydro power, 13% coal, 11% natural gas, 5% peat and 10% wood fuels and other renewables. They import about 16% of their electricity. They have almost no wind turbines at all, with wind energy comprising 0.5% of consumption (despite 97% of the public being in favor of wind power).
The countries that do have large wind and solar power generation are indeed doing it with public money (except for Denmark, of course), but thus far they have not seen a return and that public money is drying up fast. Necessity is the mother of invention, and just like Denmark in the 70s, it will necessity (one or more of those three primary motivators) which will get us or any other country to be sufficiently powered by alternative and renewable energies.