In fact, some have argued their theories are consistent. Where to go from here is also a matter of dispute. Developing Sraffianism beyond the state of things in 1960 is a difficult task. These are all areas of research. A Scandal Finally, I think that both the teaching and the practice of mainstream economic theory is scandalous.
Nothing above is new, and much of the argument has been around for thirty years now.
Yet most undergraduate microeconomic texts do not even give a hint of these disputes and how much of theory is a matter of contention. And they remain full of, at least, misleading theories. As far as I can tell, mainstream graduate eduction is not any better. I suppose I should not be too hard on teachers for this last bit. Technical subjects are always taught with this limitation.