If you claim to be a leftist and you are trying to convince people to move to #BlueSky rather than the community driven #ActivityPub options (#mastodon / #PixelFed / etc) I cannot take you seriously as a leftist.
A major component of leftist thought is community organizing and defense. It is opposition to centralized power and control. Intentionally helping people move or set up on centralized systems, regardless of what their CEO's claim about them, is directly in opposition to leftist ideals.
Yes some people are sometimes confused by the #Fediverse options. It's your job to help them find an appropriate community and work through the technical hurdles. The platforms they are moving away from, such as #Twitter, #Facebook & #Instagram were all confusing and overwhelming for people when they first joined. This is no different, it's always a learning curve.
Actually help and protect your communities by helping them not only escape corporate controlled networks but also by helping them find and utilize networks that are community run, moderated and controlled.