[lelandbatey]

It's not intended to be manipulative or lying, it's meant as shorthand for saying:

"I've reviewed your work and I have feedback. To begin, I genuinely find X and Y facets of your work to be good and well done. I am here to praise you for that work. I also found P and Q to be deficient in ways A and B; unless there are additional factors I do not understand, I recommend making changes G and K to areas P and Q."

But that's a lot of words framed very stiffly, and despite being framed extremely flatly, may still be received poorly. Hence why folks go for the much shorter and less formal "I really liked X and Y, have you thought about approaching P and Q with technique G and K?"