You are, of course, absolutely right.
No one likes to admit that they screwed up, though -- and we all know that the truth can hurt sometimes.
---
Unfortunately, you were (likely) downvoted mostly because your blunt, honest statement comes across as condescending and rude: "Maybe you're right, but you didn't have to be such an asshole about it."
What those people are either not realizing or conveniently choosing to forget is that, just as you said, we've all been warned about this exact thing* for decades! Apparently, though, the message isn't geting through. When that happens, this type of "tone" becomes necessary in order to get people to pay attention.
Unfortunately, most will still choose not to heed the warnings. Evntually, when it (inevitably) happens to them, they'll say something like "Meanwhile ... users (like me) are wondering how it is that [this could happen]" and, of course, they'll avoid admitting any responsibility for their choices. They would much rather play the part of "completely innocent victim who could never have imagined something like this might happen".
---
It reminds me a lot of a small child that is told, repeatedly, "don't do 'X' because 'Y' will happen" and, later, is absolutely SHOCKED when they "learn" -- the hard way, typically -- that, when they do 'X', 'Y' happens.