Because most pilots do not make it past the sales pitch and into production. Those that do usually fail their "study group" trials. Even if a pilot episode is ever shown to the public, it may not be picked up by any network or streaming service.
Why? Low quality art, characterization, scripts, et cetera. Or maybe because the networks and streaming services already have dozens (if not hundreds) of similar projects already rejected or in production.
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The mere fact that science may not yet adequately explain an object, event, or experience does not mean the immediate explanation should automatically default to a conspiratorial, extraterrestrial, paranormal, or supernatural cause.
