What do atheists say to the notion that belief in free will is necessary, but flies in the face of contradictory evidence?

Why do people who go to social media for "conservative views" never ask people about their personal experiences with conservatives and how the things they read online are completely inaccurate or just complete lies?
Is the idea that we're living out the consequences of past lives valid, or is it just a way to explain the challenges we face?
Why do some argue that healthcare should be accessible like guns, without being free, under the concept of rights?