It may not be. The bridge (https://rotterdampages.com/architecture-de-hef-rotterdam/) has a movable deck that can be taken out and hung back, so if the opening between the pillars is wide enough for the yacht, it should be a fairly easy operation.
Yes, and the last time that happened it caused such a commotion that the government promised to never do it again.
I thought the 'commotion' was due to them wanting to demolish it originally.