Currently Online 
I've actually never heard that argument. And, personally, I feel the exact opposite. I think the last few years of the PS3 era represent the beginning of a downward trend for Sony first-party games. Not commercially, of course. But in terms of what I look for in a video game.
With the PS1, Sony searched for and eventually found its footing; with the PS2, it absolutely soared; in the early days of PS3, it did well with games like Resistance, Folklore, Ratchet & Clank, Demon's Souls, Uncharted 1 & 2, God of War III, etc. — titles that felt like extensions of PS2-era games, at least mechanically. But toward the end of the PS3, it started to embrace a design philosophy that prioritized character, storytelling, and cinematic pretensions, which has endured throughout the PS4 and PS5 eras. In my opinion, that has done more harm than good.
