the part about lesbians is bad because it assumes lesbians are just as likely as straight women to choose firefighting. idk much about lesbians, but all the stereotypes suggest that they are generally uglier, more masculine in behaviour and more likely to work in male dominated blue collar jobs, which would mean that lesbians are hugely over represented among female firefighters. so the percentage shouldnt be (0.06 * 0.02)^3, but rather just 0.06^3. the result should in better faith be 0.000216 or 0.0216%, which is still extremely low and proves the point.
Czech Republic