Not sure why he thinks his flattery and opinion is more important than how she thinks and feels about herself.
That they’re discussing this as if by changing the style of her blouse, she’s changing the terms of her “wifely duties” to show her form to him is off-putting. No one owes anyone access to their body, physically or visually.
Besides, encouraging her to feel good within herself will increase intimacy on all levels.
Maybe Arlo here is representing the daily commenters more than his character, though.
Maybe with this change in clothing design, those commenters will see Janis as a “person” and stop measuring her worthiness based on how they perceive her weight or shape based on how she’s been drawn in any given panel.
That some people stop by here daily to dump their toxic opinions about women has always been really gross.