

If I buy a whole chicken at the grocery store, I buy it in the meat section. No one would say “you’re buying a whole chicken, therefore you’re not buying meat.”
With lobster you can extract the meat and eat it. You can also boil the empty shell to make a lobster stock as a base for a seafood soup or a pan sauce. Just as with chicken you don’t eat the bones but you can boil them to make stocks for soup or pan sauces. They’re still classified as meat and the products you make from them are considered meat products.
The original comment was “insects are not meat.” That’s it! That’s the whole claim you’re trying to defend. It’s like saying “chickens are not meat.” So they’re vegetables then?! It’s a ridiculous claim!
There are different senses (or uses) of the word meat. One sense, the narrowest one which butchers use when they talk about separating whole muscle from skin, bones, and other tissues, is the one which you are insisting is the only true definition. Another sense, the broader dietary one, classifies any product or byproduct from an animal as meat, including the whole unprocessed carcass.
Since the original claim was simply the unqualified statement “insects are not meat”, I am claiming the freedom to use the broader dietary sense of the word to show how ridiculous that statement is. You, by your insistence on the narrower sense of the word, are the one being pedantic.