If ghosts stay in the place that they died, then why isn't every hospital ridden with them?

Apparently when some people die they linger as ghosts in the building/land they died in, but if this is so, then why isn't every single hospital ridden with ghosts? Please don't answer "because they aren't real". I'm genuinely curious because I have had experiences with ghosts/spirits but... show more Apparently when some people die they linger as ghosts in the building/land they died in, but if this is so, then why isn't every single hospital ridden with ghosts? Please don't answer "because they aren't real". I'm genuinely curious because I have had experiences with ghosts/spirits but don't understand this apsect of it.
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