Not at all. Perhaps you did not see the original post which pointed out that 1,000 KWh of batteries can power 1 semi or 13 M3s at 75 KWh. This is simple math. Divide 1000 by 75. Tesla seems to strive for 25 or 30% Gross Margin on its vehicles. Say they are confident they will reach that on the M3 once production ramps to planned level. If the Semi reaches the GM Tesla aims for, ideally its GM would be same percentage as M3. Say that was 30% GM. $180,000 x .30 = $54,000 gross profit. The current LR M3 runs about $50K.
$50,000 x .30 = $15,000 gross profit. If you only had 1,000 Kwh of batteries available and had to choose between using them to make 1 semi or 13 LR M3, which would be the more profitable option just from the vehicle sales standpoint?
13 x $15K = $195,000. So if you went with using your batteries to build/sell 13 M3 instead of the 1 Semi, that would yield 3 1/2 times the profit compared to selling 1 Semi. So no, this is not looking at profit from the batteries, but from the vehicles, using a given KWh of batteries. Where they build the Semis is irrelevant. Tesla has calculated ALL costs for building Semi when they set the price for the 500 mile range version at $180K
I keep reminding commenters that this is a thought experiment. I'm not saying Tesla won't have all the batteries it needs to build tons of Semis in addition to all the M3 and MYs the public may want. Nor am I saying there may not be another way to make profits off Semi, like selling electricity it produces and stores to run fleets of Semis. Only if the supply of batteries was not sufficient to make all the cars Tesla can produce and sell when Semi ramps up, would they need to choose whether to limit production of Semis to make higher profits by maximizing car production. Human nature being what it is, it seems that many can't read and react to what's actually in a posting. Instead they read some conclusion into the observation they disagree with, and then explain why one conclusion or another is wrong. The post was only an observation about how, strictly from sales of cars vs Semis, a given quantity of batteries can generate higher profit used in cars than in Semis. No replies I've seen have refuted the straightforward math that shows this is the case.