Till December 2021 Söders party was part of the federal government together with the CDU and the FDP. No attempts were made when it still would have been somewhat possible to revert the shutdown. Only after he is no longer part in the Government he "changed his mind".

His opinion follows a simple formula: whatever <insert some other party> says, he'll be against it. No matter if it makes sense or not.

It's a quite popular strategy on the right side of the political spectrum in the West.

One thing I’ve learned about politics in the past few decades is that most successful career politicians are weathervanes - ie, they point the direction the (political) wind blows.

This is by design in a democracy. However due to political parties, the pol may simply attach to the most powerful sub group they can use to parley themselves into re-election. So they often double down on their existing stances to keep/grow their core voting bloc.