You should care because once your PC is part of a bot network, it’s part of the problem
Not being an incompetent or inexperienced Windows user, I'm vanishingly unlikely to be infected by a bot network trojan... and if that does happen, rest assured, I'll notice it.
Windows Update, on the other hand, is part of my threat model.
it's running Microslop Windows, so it's born compromised
it's an OS with constant built-in ads and spyware
it would have been considered malware in the 2000s