Dorsey runs and substantially owns Block. BILLIONS of dollars of Square revenue comes from merchant card processing.
Corporate execs have a statutory duty to their shareholders. Bitcoin acceptance has no entry or cost barrier.
At some point (i.e. just after his sponsorship of BTC Prague) it became rational to switch from resisting Bitcoin acceptance, to slow-walking bitcoin acceptance.
I find the whole thing incredibly disingenuous, and I know that I wasn't the only person to cancel BTC Prague plans.