Why do people online all sound like they have never talked a real life person before?

People online trying to give socializing advice or how to meet people. etc. Like why do they all sound like they have never talked to a real life person before. Like the advice that they give is so unimaginable, i can’t even imagine myself doing it. Especially in the era we’re in now with technology.
Why do people online all sound like they have never talked a real life person before?
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