Why not BAPis?

I don't now if I am right here. But I have very important question for me, because right now I write my thesis and I doing BPMN in SAP and I would like to know,  why ProcessExtractor mySAP-2-PPM don't work with BAPIs.



In my thesis I work with BAPIs and I think it is better solution. Maybe I am wrong?



Regards



Igor