Internationally, the countries currently paying to meet their Paris targets will need to recoup some of that investment through tariffs on imports from non-participating countries. This is the stick. Will they be nice and not put tariffs on imports that can be demonstrated to be Green enough? Doubtful, given the cartel of Green nations will see the opportunity to increase market share of their own exports. Will your personal investments into Green production, which costs more since you have to personally take on the otherwise externalized cost of pollution, cause you to be noncompetitive? On the local market. Will your customers pay more for the 'Green' logo on your product? Will they believe it? Or will a competitor eat your lunch with their dirty production, relying on the rest of us to pay to clean up, or give up on clean air, cheap healthcare and bearable weather.
I don't want to be impolite but that is verging on gibberish. Someone could build a solar farm and presumably start making money. The costs are reasonable (eg, [0]).
There is an outside risk that in 10 years an extremely expensive source of power enters the market. Assuming a bunch of relatively unlikely stars align, including that someone is mad enough to fund a nuclear plant in Australia despite the usual vocal political opposition that has scuttled the industry in most other western countrys. There is nothing there that threatens solar investment; people invest in riskier capital projects all the time. We're in the middle of what appears to be an energy crisis right now.
The targets and stuff were an issue when mass solar buildouts were an ideological stunt. But we delayed that idiocy for long enough and it appears that private investment will take it from here as long as the environmental approvals etc aren't too onerous.
I hope you are right and that solar, wind and battery farms can continue to navigate environmental regulation, be built, and actually sell enough of their electricity to the grid to turn a profit, without incentives from the government, investment in grid connections to suitable locations, and while gas and coal power remains subsidized in all sorts of ways. If this is true then, yes, the problem solved itself. But I personally suspect continuing rollout of wind and solar and the necessary scale is going to require government support.
