It has everything to do with it - gays were and in many places are still persecuted for being gay just as Turing was persecuted for being gay.
Even if your concern is only with exceptional people, think of this: what if a potential future Alan Turing is stymied from exceptional achievements because of barriers due to societal intolerance of his sexual orientation?
Even if your concern is only with exceptional people, think of this: what if a potential future Alan Turing is stymied from exceptional achievements because of barriers due to societal intolerance of his sexual orientation?