>>538695046
no, they're taking about mental shutdowns.
https://vashtijoy.tumblr.com/post/750310020204429312/oh-my-god-thank-you-for-this-i-get-so-mad-when

shido says he got goro to use his power correctly, which is implied to be about getting goro to trigger mental shutdowns, which kill people.
it wouldn't be known as something that kills people if it didn't. it would be known as "the power that causes heart attacks and strokes which DO kill people".