your question reads like you're saying it's the victim's fault
Consider that you had to send your car in for repairs to the company that produced your car, and you placed some valuables in your (locked) glove compartment. They then steal all of your valuables.
The car company (or their trained engineers) should never have to entered the glove compartment at all. The fact of the matter is that you left your valuables in your car with a trusted third party, and that trust was abused and your valuables were stolen.
The issue isn't that someone stole your stuff, it's that you trusted the company that built your car to not go snooping around and stealing your stuff.
Trusting a third party is not "careless or "reckless" behaviour, the onus is on the company to behave responsibly with your personal items/data.
EDIT: I took a look at the original article from the Telegraph[0], and it seems like the perpetrators were an Apple contractor called "Pegatron". While this isn't as bad as a BMW employee stealing stuff from a locked compartment in your BMW car, it still isn't great.
If this contractor was officially allowed to perform repairs (which it seems like they were, as Apple paid the lawsuit), then they should be held to the same standards as Apple employees when it comes to data privacy.
I said locked car but whatever. Better analogy would be you get your car cleaned, and leave cash on the seat.
> Trusting a third party is not "careless or "reckless" behavior
I disagree but maybe it's a result of being taught to be "street smart" or "common sense" as it's sometimes called. I don't jog with headphones, I don't assume someone is going to turn when driving, I don't cross crosswalks without making sure traffic is stopping, and I don't assume a technician is going to be 100% honest when working on my stuff.
Sure "it's not my fault" if I get hit by a car, or robbed but blindly trusting every "professional" you encounter is nuts.
Of course! It's more than reckless, it's disgusting, horrifying & illegal. I have kids about this age. If they left nude photos on their phone for a technician to find, I would scold them for being careless.