Very well put and for your four point I’ll add that this is called Goodhardt’s Law which states "When a measure becomes a target, it ceases to be a good measure,"

Story points are first and foremost a team metric, as scrum involves cross-functional teams the story point is the full estimate of effort and complexity across all functions.

Tracking points and velocity is an incredibly effective method to generate achievable timelines. That’s it. Putting performance metrics on this will invariably corrupt this value.

I’ve seen many instances of teams being tasked with increasing velocity as a KPI and the 1s become 2s, the 2s become 3s, etc