You are correct to point this out (not to associate inlining everything with FP). However a lot of functional code seems to use this style. Maybe people need to point this out more frequently and raise it in code reviews. To me it's like really bad academic English. The kind that uses the passive voice a lot and uses phrases like "the former" and "the latter", instead of naming things and using short clear sentences. Sometimes I'm convinced that the author of the code, if they were honest, would admit that they had difficulty keeping track of exactly what they were referring to while they were writing it.