That's a good way to look at it, for me that's an expensive lane change, but everyone's priorities are different.I would probably be somewhat interested in subscription of say $50-100 for Navigating on Autopilot and lane Change.
$6k assuming keeping Tesla for 5 years, comes to $100 a month.
I use autopilot once or twice a week so say 6-8 times a month. on the trip I would change lanes 3-4 times. So say 30 times.
So every time I change lane it will cost me $3. Is it worth it? Who knows.