Scion of Murgen (He/Him)
That seems true, from what I've seen. Though at least some of them (one of my groups is close to finishing Rime of the Frostmaiden, for example) include a sandboxy portion, where the PCs can wander around and take on different parts that strike their interest, at least in whatever order they like. I seem to remember it being a thing that we missed out on meeting one NPC who had been killed by the time we got around to following up on a particular rumor...I'm sympathetic to this point of view. To my mind, the major issue with adventure paths is that they presume that the PCs are reactive in what they do, rather than proactive. It's never about achieving personal goals and ambitions, it's about stopping some looming threat to the region/world/multiverse, which can absolutely be interesting and dramatic, but tends to be one-size-fits-all in terms of motivation, since no one wants their home to be devastated.