Static background images on knowledge checks

I would like everyone’s professional opinion on this take. The target audience (learner) is adult learners (technicians, skilled trades, etc.).

Scenario:

When creating a knowledge check for an eLearning course, the designer wants to place a static background image with semi transparent answer choices with semi-transparent container. And a static avatar.

There are four multiple choice answer choices.

My advice was to a. Remove the static image because it’s not adding educational value and could be distracting.

b. Put the avatar in the instructions or feedback layer and remove from the screen with the question and answer choices to reduce cognitive load.

C. Double-check the colors with the WebAIM checker to ensure the answer choices meet WCAG color contrast standards against the background.

I was overruled because this design “looks nice.” And the learner may prefer something that looks nice over something plain.

They used “dual-coding theory” to provide a reason for keeping all these elements on a knowledge check. My understanding of dual-coding theory was that these elements should provide value.

I work on a very small team and have been placed in charge of usability, but I keep getting overruled due to aesthetics.

Any ideas on what I should do?