Yes, animal testing in science leads to “gruesome” animal deaths. The alternative is human testing. What would you prefer?
This whole story is an absolute beat up.
Animal testing need not be gruesome - and indeed must not be according to most approvals.
Typically, minimizing animal suffering and humane procedures for determining when and how to euthanize animals is typically a big part of getting sign off for this kind of thing.
“Gruesome” is just a clickbait word used here by whoever wrote the article.
'…an internal part of the device “broke off” while being implanted. Overnight, researchers observed the monkey, identified only as “Animal 20” by UC Davis, scratching at the surgical site, which emitted a bloody discharge… …A surgery to repair the issue was carried out the following day, yet fungal and bacterial infections took root. ’
'Animal 15 began to lose coordination, and staff observed that she would shake uncontrollably when she saw lab workers. Her condition deteriorated for months until the staff finally euthanized her. A necropsy report indicates that she had bleeding in her brain and that the Neuralink implants left parts of her cerebral cortex “focally tattered.” ’
When you get a device jammed in your brain and a piece of it breaks off and you start emitting bloody discharge because of the fungal infection in your brain that leaves you shaking uncontrollably for months because your brain is bleeding and your cerebral cortex is torn to shreds, and you die, please forgive me for describing your death as “gruesome”.