I don’t think anyone was suggesting that they did. (Seems like a bit of a strawman to me)

However they do allow you to smooth or average spikes that could otherwise be problematic.

In your articles analogy I am able to drain a pot of pasta down the sink even though I might not be able to pour the same pot down the drain.

It lowers the load if the consumer is able to process batches of requests efficiently (ex. for vector operations).