Completely agreed.

• Shirt pattern is coherent.
• Wall outlet is coherent.
• The plumbing itself looks correct and reasonable.
• The lighting and shadows are consistent around every object.
• The color palette lacks the AI piss-tone.
• The faint washed-out silhouette through the window isn’t common in generated images.
• The box in the bottom right is clearly sliced with a boxcutter. The tape on the side of the box lines up with the cut section on the raised flap (running under the shipping label).
• The JPEG compression artficacting wouldn’t be present on output straight from AI.
• No weird dslr-imitation bokeh look.

Not AI.