Absolutely. I've been DMing for 40 years, and I find the number of NPCs, the details of their backgrounds, the convoluted plots and motivations in Paizo APs are way too much.Paizo definitely over-writes their stories, IMO. (I would say that WotC does too. I'd take something like Barrowmaze over Storm King's Thunder, for example.)
Over-writing is another case where publishers are catering to one segment of the market - those who buy adventures to read, at the expense of another - GMs who want something straightforward to run at the table. I'd wager vanishingly few GMs who homebrew come up with adventures anywhere close to as complicated as Paizo, and to a lesser extent WotC, make their published campaigns.