You said "Android phones don't do that anymore", "that" referring to "have it show up as a removable storage device".
Pointing out that the protocol used is leaky or bad in some technical way doesn't change that Android phones do in fact show up as removable storage devices when connected to (at least Windows) PC's. Your original assertion was incorrect.
samcday even said they just wanted to copy some files around. You don't need to be able to modify files in-place from the PC to accomplish this.