It's not the slash itself that's the problem (unless tinhatting is involved), but there's a lot of real-world homophobia and biphobia that goes alongside slash and m/m romance fandoms. Shipping m/m doesn't make one's work immune from criticism by gay and bi men, doesn't absolve one of relationship homophobia and biphobia, and it doesn't make one the savior of m/m lit and entitled to throw a shitfit when LGBT literary awards prefer LGBT authors.