Amen. I do kind of get why many people miss Saylor's point because he kept saying "risk-free" - but this was in the context of fiat for the foreseeable near future. However, Saylor also acknowledged the inherent counterparty risk involved in loaning Bitcoin.
Ultimately, there will always be people (and organizations) willing to pay a fee (i.e. interest) in order to borrow capital; and, there will always be people (and organizations) with capital willing to make loans that earn at least enough yield (i.e. interest) to account for some risk of default.