https://pmc.ncbi.nlm.nih.gov/articles/PMC7812885/
Temperatures during a fever can go high enough to damage cells and interferes with normal functions, it also interferes with viral, bacterial and fungal replication and other mechanics.
Not all chemistry ‘works better’ at higher temperatures with many proteins only functioning well within very narrow temperature ranges.
Yes, that’s how computers work. Like all other depreciating assets.