I too agree that most people, even when given the option, will choose not to actually hold/use Bitcoin. Like you said, most people aren't needed for radical change.

But it is also true that until it is in your possession through self-custody, or ability to unilaterally enforce, it's not Bitcoin. It's an IOU with the name "Bitcoin" attached to it. Nothing is special about an ETF or custodial solutions. Thats just normal traditional finance that we already had before Bitcoin.

Defeats the entire purpose for Bitcoins creation - getting rid of trusted third parties. Nothing is special about Bitcoin without that.