Makes sense: lobsters are essentially insects, and eating insects, such as cockroaches is disgusting for most people. I still refuse to eat lobsters and shrimps for this exact reason: I'm not eating any insects, ever.
You: I'm not eating anything under this label as it must be alike!
But in this case insects a lobsters are not even close in the tree of life. Maybe they indeed look alike a bit. Do you eat feces because it does look a bit like chocolate?
Chocolate and feces isn't really a great analog.
If you want to include both spiders which are Chelicerata and grasshoppers which are Hexapoda that’s Arthropoda.
The several billion people of the world would like to have a talk with you...