Don: What is something has NO use-value, yet it required considerable labor to create. Does it have labor-value? Like, for example, digging a hole and filling it in. Considerable labor, no use value (we are assuming here that your mother-in-law was not placed in the hole, etc.).What if something has no use-value?---the favorite straw man of pro-capitalists when they first confront Marx's theories...
If something is WORTHLESS (or costs more to make than the average necessary social time required), then the person who makes this item will SOON GO BANKRUPT---or give it up.
Example: untalented bohemians eventually realize their 'day jobs' have become their career...