Might have to do with where a bias stems from. Bias against elderly has to do with deterioration with age. That remains true today. Bias against gay people had

Might have to do with where a bias stems from. Bias against elderly has to do with deterioration with age. That remains true today. Bias against gay people had to do with the need to protect against disease. This is not true today because education, condom usage and improved treatment have cut down on the impact of stds, eliminating societal need for homophobia.