I'm not talking about being derogatory or malicious, I'm talking about genuine constructive criticism. Fair, balanced assessments highlighting good and bad and then articulating it when there are changes or omissions that may be to the product's detriment. If when they review a Mac all they mention is the positives then it's not a review at all...it's an advert.Probably Apple interest sites that don't want to stay in business.
It's pretty clear from comments I've read even on this site that, as a whole, Mac loyalists don't like to hear criticism of Apple from tech reviewers. There's a good reason why Linus Media Group and Mac Address, for example, get an incredible amount of hate in the comments on this site, while sycophantic Apple boot-lickers like Snazzy Labs and Max Tech get the nod as "impartial" Apple reviewers.
It would also mean that when a product did get a rave review that praised it to high heaven, it would actually have meaning and credibility. An 'Apple enthusiast' website should want Apple to be better where it can be. In recent years Apple has chosen to be petty sometimes and the media silence has been deafening.
I doubt all those who visit Mac Rumors would stop doing so because they highlighted some unnecessary shortcomings of Apple or an aspect of their products every now and then.