This comes off as victim blaming.
As a consumer, I would expect the hardware I buy to be able to dissipate its own heat. If it can't, that's a design flaw that Dell needs to either fix or stop selling the product.
Actually, I'm pretty sure that false advertising is illegal in most countries, including the relevant one here (the US).
Going off-topic, but yup. It's not victim blaming to point out when a victim didn't even take normal precautions. For example, if you're crossing the street, then even if the walk signal says WALK, you should still be looking to make sure there aren't any drivers running the red light. While yes, if you get hit by a car, it's the fault of the driver, you still failed to take the necessary actions for self-preservation.
Hell, there's a pedestrian crossing near me that isn't at an intersection, but has yellow flashing warning lights that turn on when you press a button. There's also a speaker that says "Cross street with caution, vehicles may not stop".
I do that with one of my GPU servers, because the alternative is switching to liquid cooling and that's more work than I want to put in right now.
Back when dual GPU’s where still a thing they actually needed laptops to be thick or wide, but 100w isn’t that bad.
I guess it's a philosophical question whether Dell should stop selling these kinds of machines, or continue to separate those who ignore basic physics from their money.
I have a semi-portable Dell Precision M6500 from 2011. It still runs and does what it should, but it weighs 4 kg and is 3.5 centimeters thick. Both those numbers are twice that of an XPS 15, and it still throttles down the quad-core i7 after about 120 seconds at full load IIRC.