Mitochondria are another clear example showing the tree of life model is broken. And all it takes is one counter example to show a model is bullshit.
The tree of life model is almost useless for understanding single celled organisms which vastly outnumber there multicellular counterparts. It also creates a lot of confusion where people assume the model matches reality instead of poorly mapping to reality. Consider species is a surprisingly vague concept where A and B may be compatible and A and C are compatible but B and C are not. The point is it's based on inaccurate assumptions, if you understand how and why the model breaks down you can extract a lot of value from F=MA or any other such approximation.