It's all very well for you to make that claim. But you didn't back it up. A concrete example would be helpfu, and there is no need for you to reveal your industry.That’s where your assumptions falls down though - you say it’s not disclosed to anyone that it shouldn’t. I work in an industry where personal data is needed on a daily basis and I have seen multiple occasions even post GDPR, where I ask for one thing - and the person sending just gives me a dump of information 99% of which I don’t need and about 90% of which if people knew it was being handed out they wouldn’t be happy.
As for getting too much information, I sent off HAP forms and proofs the other day, the lady in the office couldn't believe I could be so efficient at sending her what she needed (I'd already been thru it you see). But I find most of the time they get the wrong information is because civil servants etc lay out forms way too complicated and then blame the entire population for supplying the wrong information because we are idiots.