It's not more viable now wealth inequality just means that there are more rich people to benefit.
You could have used the exact same argument for normal flight 100 years ago. Supersonic flight being more expensive than normal flight doesn't mean it will always be too expensive for the masses unless you assume there'll be no more economic growth ever.
The low-volume, high-priced rich-person toys (Roadster) finance the scaling up that enables lower-priced mass-manufactured product (Model 3).
Eventually, that means that there will be some seats in the back of the regular plans for everyday wage slaves.
You must not have a neighbor with a car whose alarm constantly goes off at random points throughout the day right outside your window. You eventually don't notice it. Speaking from experience
https://www.eea.europa.eu/en/analysis/indicators/health-impa...
On getting used to it, people adapt in that they stop consciously noticing the noise, but it's still constantly processed and grinding on one's environmental awareness.