You're confusing your discussion points. If we're talking about if Tesla is attempting to follow a similar strategy to Amazon where their marquee product is just there to create captive demand for the actual profitable product then the answer is yes. The marquee product is electric cars, the actual profitable product is batteries way beyond electric cars which is a massively larger potential market. Same strategy and the strategy itself is sound, it's just that I don't think they specifically can pull it off because Elon doesn't only not understand operations he doesn't seem to realize he doesn't understand it.The energy density is too low. Nobody in the Western world can produce EVs profitably. Maybe the Chinese can, but strictly speaking it is not just Tesla's fault the lack of profits. On top of that they are badly organized but eventually that can smoothen out. But as long as there is no breakthrough in the battery front, they won't be selling profitable cars without government subsidies to the masses.
If you want to talk about Tesla's lack of profits, first off they've had several profitable quarters and if they switched to a profitability versus growth mindset (and stopped sucking operationally) the product is already profitable (and Tesla already reached the federal tax credit phase-out mark). And it's an important thing to realize that in fact a "breakthrough" isn't required to drive down cost curves. The solar pv industry is the best demonstration of this. Back in 2007 timeframe silicon pv was in the $7/watt range. A bunch of "breakthrough" thin film solar companies got tons of VC money with the promise that they'd cut prices in half to $3.50/watt within 3-5 years. Many of them succeeded. The problem was that the mass production of plain old silicon PV, driven in large part by government incentives, had driven the product down the price curve at it was now only $2.50/watt. Today the completely un-subsidized price for panels is $.35/watt. That's plain old silicon, no "breakthroughs" and in fact the effort and money focused on "breakthroughs" turned out to be a waste. This cost curve is apparent in wind turbines and inverters and so far is also happening in batteries. No reason to believe it won't continue. After all, before we spent trillions in today's dollars subsidizing fossil fuel over the past 100 years it too was rare and extremely expensive.