I despise this argument & your parent said monopolist behaviour. You can't just ignore the network/cool kid phenomenon when considering social networks; they're

I despise this argument & your parent said monopolist behaviour. You can't just ignore the network/cool kid phenomenon when considering social networks; they're all trying to lock you into their own platform, and while you're right that they cannot be described as a full fledged monopoly they are trying their darndest to behave like one and disincentivise diversification.