Philosophical talk?: The opinion that there is a cause on the side of the bullied

Hello.
Today I would like to talk about a tweet I saw on Twitter (now X).
In society, we often see the opinion that "there is a cause on the side of the person being bullied."
The standard counterargument to that is, "The person doing the bullying is obviously the one at fault."
The exchange I saw on Twitter was also a back-and-forth argument following that standard pattern.
But whenever I see this kind of exchange, I always think to myself:
"Aren't 'being at fault' and 'having a cause' two different things?"
I wonder if this is because I am a person with a background in science and engineering.
I perceive a "cause" as just a "cause," and it doesn't necessarily mean that something is bad or that responsibility is being assigned.
Of course, it is not uncommon for a cause and responsibility to be linked.
However, that is just them being "linked."
Hamburgers and fries often come as a set, but a hamburger is not fries.

Whether there is a cause is separate from whether something is bad or whether there is responsibility.
For example, suppose I left the house forgetting to lock the door. Because the door was unlocked while I was away, a burglar broke in.
In this case, who is at fault?
It would be the burglar.
Because it is the burglar who will be caught by the police and held criminally liable.
But if you ask what the cause of the burglary was, it was forgetting to lock the door, right?
However, regardless of whether the burglar is at fault, I am the one who suffers a loss if I get burglarized.
That is why I usually lock the door.
You wouldn't say, "Since the person doing the burglary is at fault, I have no obligation to lock the door," would you?
You would take measures against burglary.
Regardless of whether the other party is at fault or not, if something happens that causes you trouble, it is still trouble.
And yet, when it comes to bullying, it becomes, "The person doing the bullying is at fault, so I won't take any measures."

I wonder why that is.
That is all.