As a donor I feel that organizations should provide some details how donations are used. I'm requesting the same from other organizations I'm donating to if those organizations are more than just three persons working on a free software project in their spare time.
Originally donations to matrix.org foundation were supposed to be used to fund matrix protocol work and to hire a developer. This is still listed as a goal (that was reached) on Patreon. Only due to asking I found out that this never happened and donations are used to pay matrix.org homeserver instead, which of course is also a good cause, but should be communicated transparently.
I don't mind the accounts specifically, I just think that making them public is the easiest way to fulfill the needs of transparency. Of course a summary on the website, a blog post with explanations, etc, would also be nice, but I understand those mean extra work and there might be more important things the prioritize.