It’s usually a good idea to gather hard data (as “hard” as a survey can be, anyway) even if the results seem obvious, sometimes it brings surprising results. It can also serve as a base measurement for whether the issue is worsening or improving if you repeat the survey.
And water is wet 🙄 Those 20% AfD voters are not ghosts that only come out when there is an election.
It’s usually a good idea to gather hard data (as “hard” as a survey can be, anyway) even if the results seem obvious, sometimes it brings surprising results. It can also serve as a base measurement for whether the issue is worsening or improving if you repeat the survey.