> "the product requirements only said there should be a Save button, not that the data should be saved"
If these were really the requirements, then the PO's salary should be split and go to the developers, because they would need to do that job anyway and at least do not get distracted by an incompetent PO.
This kind of culture eventually produces the equivalent stupid formalization on the dev side like "all modules must have at least 99.85% coverage and a three-phase UML diagram review by the architecture team before deployment".
Better to have some slack and people willing to use common sense on both sides.
The former shouldn't be paid more than a front desk receptionist, and I'll keep the difference since I'll be picking up the rest of the role.
I guess count yourselves lucky you've only had bad POs and not bad POs and bad developers.
In a simple project a mockup can be enough, but then what do you need a PO for?
Deep technical knowledge can help a PO, especially in technical products, but it should not be influencing how they present to the dev team. Otherwise they're just another even-less-accountable architecture astronaut.
If someone's answer to "why does clicking 'Save' and then reloading not show the saved data?" is "the product requirements only said there should be a Save button, not that the data should be saved", I don't want to work with them. If you want something like this go work for a body shop, not a product-focused company - and then don't complain when you never get the interesting technical work.