If you trust and believe in a company (MSTR) and a leader (Saylor) so much so that you give them your capital, then why would you distrust them having the bitcoin and their reason for not sharing the addresses with everyone?
They are a publicly traded company in the US. The SEC, who hasn’t been too hot on bitcoin until now, is not taking Saylor’s word on them having the bitcoin. Furthermore, there is no incentive for Coinbase and Fidelity to sell MSTR paper bitcoin, especially after seeing what happened to SBF.
The orange piller mantras is not how the real world works.
Revealing their addresses will expose when and how they acquire bitcoin, which has security implications and could have negative impacts on how they deploy their ATMs and convertible bond offerings.