No you're wrong. It absolutely is a consequence of connecting an LG monitor. Connecting an LG monitor triggers a chain of events that deterministically and deliberately cause these ads to be shown.

The hardware alone is not sufficient for this to happen, but if you were to modify or "fix" the monitor (specifically its firmware) so that it no longer identifies as an LG monitor, then it would no longer cause these ads to be shown.

In other words, if A causes B and B causes C then it is correct to say that A causes C.