There's plenty of people who do - see the https://en.wikipedia.org/wiki/Unikernel https://en.wikipedia.org/wiki/Unikernel stuff and Firecracker VMs and simplifi

There's plenty of people who do - see the https://en.wikipedia.org/wiki/Unikernel https://en.wikipedia.org/wiki/Unikernel stuff and Firecracker VMs and simplified runtimes like Lambda - But agreed, a useful consumer computer requires a whole suite of programs and tools that comprise a "OS" to be useful.