Psionics and the everyman

[Contiguouskittycat]

From what we know about how psionics manifest in the population, is it possible for most people to develop psionics if they train and take the big red pill? Or is it mostly a select gift that only a few are ever able to use? We know our character has unusual amounts of potential, but could most people, for example, learn enough metathermics to light a candle if they really worked at it?

[Kajmak]

Maximum psi points and psi regen between you, beasts, tchortists and bosses are fun thought experiments between actually sustainable spell-slinging and borderline insanity, Synesthete has overclocked his mind to have 14 more regen compared to Eidein and his long journey.
Your quad-psi character learned all those spells within the span of a few days/weeks possibly from damaged/bootleg psionic mentors whose side effects don't show up immediately(hey that's a build idea:no psi mentors allowed), (s)he WILL go insane within the year at most after the game's events end.