Most of the complications pertain to tonsils can be treated with medication, although in some troubling cases, where patient has severe breathing problems or risk of cancer, then an ENT decides whether to go for it or not.
Now, the surgery namely Tonsillectomy is known to be miner and adults may take 2 to 3 weeks to recover. But, any death associated with post-tonsillectomy complications is quite rare and might have other causes than the surgical procedure itself.
One of my cousins had that surgery, he had recovered within few weeks and now it's been 20 years since then.
Thanks for sharing something informative.