And we all want many thing in life, like for example I would want my bus to work every 5 minutes instead of every 30 minutes, but everything nice in life has a hefty price, and if you make a large part of the economy bankrupt or leave and workers unemployed or broke from rising costs, in exchange for financially unrealistic environmental targets that only a small part of the population can tolerate("let them eat cake"), then that might not sit well with a large part of the democratic voting population who has to bare the brunt of your wishes.
A balance has to be found between what's nice and desirable and what's economically feasible without causing economic hardship on others, otherwise something breaks and you get rising extremism and .
Oil companies and countries that sell oil will say it's not feasable and companies that produce panels says that it is.
We cannot rely on "what is economically feasable" because unless you are and expert you will have to get that info from one side or the other, and even independent bodies will be under lobbying pressures.
At this point, nobody trusts the other side to "play fair" and reciprocate, which makes standing on principle feel like a loss. If all sides stood up just a little bit for the principle of "I don't agree with that person, but I defend his right to voice himself", we'd all be better off.