Perhaps this is a cultural difference, but I've collected names and addresses and phone numbers, and I worked under legislation where I can go to jail if i disclose the information i saw or had access to.
Later, outside of that legislation, when I'm collecting it, I deal with the Australian Privacy Principles [0].
It doesn't bother me that much, because I take a "well if we don't need it, we shouldn't be collecting it, and if we are collecting it, we should do so minimally and protect it anyway."
I believe under GDPR, if you need it, you can collect it. If you don't need it, why would you be/collecting or holding it?
There are certainly legal problems/ambiguities around ip and data collection, and yes, its usually legislated by people who really don't understand tech or information theory or data linking, but frankly I haven't heard very many legitimate ones brought up in relation to GDPR.
What I think someone naive and fresh out of college would do, for instance, when asked to delete data is...delete data.
And if they think that "delete my data" means go through a database and put a '1' in a delete flag against a record that is still retained, then I think they're not so naive, they picked that up somewhere from someone acting nefariously who told them it was "best practice".
And if they picked that up somewhere and it is industry "best practice", that's the kind of bullshit we should be weeding out of the tech industry.
If the user can't view/delete their data, that's a dark pattern. Which again, see above: needs to be weeded out of tech.
[0] https://www.oaic.gov.au/privacy-law/privacy-act/australian-p...