Because it's not cool to hate on CDPR, yet. The grumblings that accompany such disdain have begun on its board and elsewhere, though. It's mostly centered on hate towards this story's gutted politics and the botched connectivity with the previous two games, but it's also about the game's emerging bugs (XP, disappearing crowns) and graphical downgrades.
And why do you think that is? I mean, once upon a time (during the NWN/KOTOR days) Bioware was virtually off limits from consumer criticism. Yes, you had your outliers and fanboys of other brands come in and bash Baulder's Gate, Neverwinter Nights, KOTOR, Jade Empire, and Mass Effect 1. But Bioware was basically that shining diamond that you dare not try to break. But things have changed for Bioware, especially when they went under the EA umbrella. Many of their prominent writers like Drew Karpyshyn are no longer around, the Doctors are no longer around and Casey Hudson is now gone.
In a way, I agree with you about CDPR. In fact, it is cool to actually love CDPR and cool to hate on Bioware mainly because Bioware has EA attached to them while CDPR remains that cool "independent" studio that is sticking a middle finger to the suits & ties of the industry. I mean when CDPR does stuff like this:

You can see why CDPR is considered by many to be the "gamers developer" while companies like Bioware are the "corporate developer". It is sort of like the Rebels vs the Galactic Empire with CDPR being the Rebels and Bioware being the Empire.
With that being said, could this last forever? Right now CDPR is the fan favorite among many gamers while Bioware seems to not be able to catch a break. DA2 they got a lot of hate, ME3 they got a lot of hate, SWTOR they got a lot of hate but it has since leveled, and DAI has not gotten much hate, but it sure isn't getting much praise either, it is sort of that neutral game that is satisfying everyone until Mass Effect 4 comes in. This is why I always ask just how successful (reputation wise) is DAI because while it might not have the tsunami of complaints like other 2014 games such as Watchdogs or Destiny, it sure isn't getting a lot of praise in the same way TW3 is. Nobody is saying that DAI represents a new paradigm for how WRPGs should be developed in the future but many are saying that for TW3. With Mass Effect 3 people will either REALLY love or REALLY hate. That path will begin next week once ME4 is revealed at E3.
Either way, you bring up a good point about people not wanting to hate on CDPR just yet. CDPR does seem to have a lot of momentum and they are smart to milk that momentum as long as they want before they begin to talk about Cyberpunk 2077.