I think you fail to account for the people that just don't care or are too (morally or otherwise) corrupt to care. You will not get a CxU voter to vote for anything else than their christian conservative values where anything against the status quo is bad.
A simple fact is that actions to minimize climate change will never be popular because it will affect most people in significant ways and it will hurt. We still need to do this, though. Conservatives are so hyperfocused on not changing anything and making other people's lives miserable that they cannot see what is coming to all of us not in the far future but potentially really soon.
There is no time to appease the conservatives and do things more their way to be more popular, because as the Americans say "if you give an inch they take a mile". Nothing will happen and that is something we all can't afford.
What it ultimately comes down to is corporate interest. Conservative parties will do nothing until it is in the interest of the corporations that fund them and their corrupt politicians. As you can see with the 49€ ticket, the railway maintenance or basically anything in control of FDP, CxU or SPD