There is a reason why homosexuals use non-homosexual businesses. They suck, as in they don't make very good food.
Now you're in my wheelhouse.
A good portion of the chefs, bakers, and just cooks that I deal with daily are gay. To say that there is a correlation between homosexuality and culinary ability is simply wrong.
There are as many great gay chefs, bakers and cooks as there are great straight ones. The reverse holds true.
The reason homosexuals use non-homosexual businesses, at least probably in this case, is to drive the point that these homosexuals drove home.