To answer in a more constructive way:

No mainstream desktop OS tries very hard to sandbox drivers. Some drivers on both Windows and Linux (not very familiar with Mac) can be implemented as userspace drivers, as long as the performance hit is acceptable, but for many devices (e.g., graphics drivers), you need a kernel driver to get reasonable performance.

Therefore, if your OS supports loading 3rd party binary drivers (Windows do, Linux technically does as well, but tries to make them hard to use in practice), it cannot really refuse to load kernel drivers and only allow userspace ones without breaking a lot of machines.

Even if you have a userspace driver, the device may still get DMA access to RAM. IOMMU is a thing, but due to backwards compatibility, the driver chooses whether to enable IOMMU protection for the specific device on Windows.

If you're willing to write your own microkernel and bootstrap its driver ecosystem from scratch, your claims would be reasonable. With current desktop OS architecture, not really.

As for the accompanying software, there is a good explanation in another comment of all the valid use cases it has (printer dialogs, audio interface configuration,...). LG abusing that to show ads is primarily LG's problem.

Read sibling comments to get answers to all your (non)questions.

You don't have to counterbalance every useful sentence with a toxic message.