It's birds and airplanes: airplanes don't have feathers, but they solve different problems. Aerodynamics is a science, actual airplanes are engineered. But aerodynamics as a science evolved more slowly than actual flying airplanes; that's where we're at with ML.
Noam Chomsky thinks that deep learning is more of engineering than science [0]
He says what we need is something like a Turing machine but for intelligence.
[0]: https://youtu.be/ndwIZPBs8Y4