I think offering a random percentage to pass down talents already "explored" in previous lives or within the bloodline should have the chance to be passed down, but a much lower percentage than the 5% you have to even obtain one. Since those holding titles(?) are about to accumulate SP quicker than those without just by doing their job as a said title holder.
(correct me if I'm wrong on the last part, but I read that it's easier to gain SP if you just do your job as a noble/working at your table).