Differing views are welcome if you can support them with data and evidence. This board, given that it is primarily made up of people who value data and evidence over everything else, tends to settle on similar viewpoints and contrary viewpoints are rejected because they run contrary to the evidence.
No. Try to talk about race and IQ and see how far that gets you. Talk about Gender not being 100% a social construct. Talk about the wage gap.
All have data, but, none of it matters. Some topics are taboo.