I strongly disagree. I consider it comparable to something like financial administration. In which an "expense" or "exchange" has two sides. Me, paying you, you receiving the money.
It is not up to me to decide to just release such data. Because it encodes other people's data too. If I were to release my financial records because "it's my data", i'd be exposing a lot of people, organisations and companies who I had interaction with.
But it is up to me to decide to release my financial records. All the parties I've dealt with have to expect the possibility (unless there is some signed agreement that prevents disclosing them).
I'm pretty sure that if <insert ecommerce platform here> were to leak all their financial transactions, that is considered a large data-breach and would be considered a privacy infringement.
I am aware that "an ecommerce platform" is something else than "your personal finance", but the principle is the same: X shouldn't release other people's financial transactions just because those were done with X.
It is not up to me to decide to just release such data. Because it encodes other people's data too. If I were to release my financial records because "it's my data", i'd be exposing a lot of people, organisations and companies who I had interaction with.