Like every single companion character is caught between two masters, and has some other superflous magical mutation.
Kinda true. Everybody has strong "Mary Sue" potential indeed.
Astarion = A slave to Cazador
Lae'zel = A slave to disrespect
Sassy = Probably some Asumar qualitys and a Slave to sass & Amnesia
Wynn = Bound by contract to a booty Devil
Gale = A slave to his affliction
Not a single mere Baker from BaldursGate among us.
But tbh it would feel kinda wierd if a complete average Joe would have escaped the Nautiloid and Avernus.
With enough luck (?), yes of course. But this was not a gentle flight.