Is "dark humor" generally acceptable or is it just my parents/culture more sensitive towards jokes?

Example:

My parents are frugal af and refuse to get a new phone charger and tries to "fix it". I think my mom mentioned it caught on fire (or sparks) once or something like that...

So I was like: "Just get a new one for fucks sakes ... Oh I mean I guess you can keep using it... the house is insured, fire is included in the policy, so I guess it's fine."

Then my mom gets mad because it's "bad luck" to say stuff like this... as if somehow making this joke is gonna have a cause-effect to the house catching on fire... 🤔

Like are they afraid of angering the Gods? Spirits? Wut lmao?

🤦‍♂️