You can do extremely complicated things on chain that require manual human analysis to figure out how to report it. You can do this thousands of times per year. It adds up to a huge amount of work.
If you do complex transactions thousands of times per year, it would be reasonable to expect (and in many places be a legal duty) to figure out how you'll be accounting for these transactions in your books before the first transaction is made, and keep up to date bookkeeping for these operations continuously - not just making some reporting long after the fact. Like, such activities are so clearly above the level where either you hire a certified accountant or become a skilled accountant yourself, that's table stakes for doing such things. You're effectively running a business, so you're required to act like one, you're not permitted (generally, depends on jurisdiction) to just wing it.