First,see the entry below to see what the joke was: Turnips really make a strw, but Parsnips stand alone
You see, the flavor of turnips in a stew make it full and tasty. They add to the stew and make it better. Parsnips, on the other hand, are strong and root-like. They only make the stew rangy and weed-like. But boiled, buttered parsnips by themselves are delicious. They stand alone.
Now, what is the message here? Is this a metaphor for life? Of course it is Some people when in a crowd dominate and ruin the conversation. When some people are there,committees cannot function
But if you have a converrsation with that person by himself, there is no crowd to impress, and he can be himself and he is delightful company. He is the parsnip. Alone he is fine, but in a crowd (stew) he ruins the business at hand
There. NOW do you get it.