That isn't always the point of a review embargo. Take a game with heavy marketing that the corp realizes is going to get bad reviews. Sometimes they will delay reviews of things like that as long as possible, until day before or day of release.
Notably, the video game industry pioneered the conditional embargo - where you can publish a review freely as long as it's above a certain score. There's pretty much no explanation for this other than "we want to lie to customers", and there's pretty much no definition of journalistic integrity that would permit signing it, but it happens nevertheless.
(Which, interestingly, means some sites that don't issue numeric scores are barred-by-default from those games. I think that's sometimes been used to spot these embargoes?)
The computer hardware market is pretty different from the video game market. Video games tend to be much more reliant on pre-orders and the first few weeks of sales, while computer hardware is subject to seasonal fluctuations but otherwise maintains strong ongoing sales throughout the product cycle. Games are also much less amenable to objective comparative analysis.
In the computer hardware world, a review embargo that coincides with the product hitting the shelves does not carry any negative connotations about expectations for the product's reception.
