Comment by panick21_
The problem is just there is no concept of a car company where they only sell their standard mass market vehicles. Somewhat more expensive higher margin vehicles are in the lineup for almost all the other companies. Its kind of strange to suggest its not worth it when it is seemingly worth it for most other companies.
Maybe the wisdom of having a 'full lineup' is wrong and has to do with making dealers happy.
On the other hand, having 99% of your sales be 2 very similar vehicles seems questionable strategy.
It is worth it when it is done right, i.e when you do correct market differentiation (see my other comment here on Mercedes) to avoid your low end cannibalizing your higher end. This high margin really helps you, and this is why almost everybody does it. EVs are probably even better suited for it given that the platform itself is easier/cheaper to share between the low end and the high end - thus the current Teslas S/X story looks even more of a failure as by releasing 3/Y that similar to S/X (that probably helped a lot with 3/Y sales though) they forced themselves into the need for a very significant (expensive) redesign of S/X while having very low sales of it.