"there is more LGBT people in proportion than other social medias too, thatβs another bias" - ditto
"There is more people that care about privacy than in the general population, too" - ditto
"lot more of people on BlueSky than on the Fediverse is already a proof that the Fediverse isnβt a random sample" - no it isn't. Not sure what you're not understanding about the word "random", nor only 25 random votes needed
"there is some" - X is a Nazi Bar, so of course π