What the hell are you talking about? You are completely wrong on this. macOS has had high DPI support since 2012, when the first Retina display Macbook Pro came out. Applications bundle 1x and 2x sized assets, and fractional scaling is achieved by shrinking the 2x upscale back down to match the selected fractional scale.

The first lets you indicate your account is a bot account, the second controls visibility of other bot accounts.