I’d have to guess the biggest contributor this is first and foremost safety and trust.
The next one is Context. My guess is most people on teams like this lack a shared vision and understanding of the clear, measurable, success goals.
To steal unabashedly from Adam Nash: “What game are we playing and how do we keep score?” That responsibility clearly lies with Product but as we all know, sometimes Product struggles to get a good understanding of the game and the scorekeeping is often shifting and or different depending on the audience. Likely for the same dysfunctional root causes of the lack of trust.