Tesla has actually released stats on what cars their buyers trade in [1]. Most of them are not premium brands. Toyota is the largest single brand.
The anecdote about the people you know who are buying Teslas may be more reflective of who you know than who is buying Teslas.
[1] https://insideevs.com/news/504078/what-cars-tesla-buyers-tra...
That's more than twice that of all of Porsche, VW (which owns Audi), Mercedes, BMW, Ferrari and Volvo put together.
Without selling down into the mass-market and out-competing Chevy in that segment, that price premium cannot be justified.
But they're not.
On a trailing four quarter basis; BMW has more revenue than Tesla ($135bn vs $67bn), better operating margin than Tesla (18.6% vs 16.2%) and therefore also higher earnings ($25bn vs $11bn).
The Leaf and Bolt both have starting MSRPs around $28k, and most probably sell in the mid-$30k range, so there is a significant price difference.
I would definetly put BMW and Tesla in a different class, with Tesla being the budget option.