If there's a dependable on intermediaries, does it defeat that purpose?
You be the judge of that, Does it? People starting to use brokers doesn't mean it's in Bitcoin.
as Bitcoin continues to mature an introduction of Brokers, the risk of an unpredictable volatility may be influenced less by there presence, but more by the incentives they introduce!
They are not the answer to Bitcoin volatility.
They can assist short term in making purchases that wouldn't have much impact doesn't mean
They would eliminate volatility in Bitcoin.
Institutions like Strategy makes use of it.