So Pro photog here chiming in. Cameras need light to take photos, that literally all a photo is a camera capturing light. To capture any photo there are 3 things that come into play: ISO (that amount of grain), Shutter Speed (keeps away the blur), and Aperture (how blurry the background gets). The cameras of old got super grainy photos in low light, that was a big complaint because low light was basically unusable and there wasn't a fix. There are only two apertures on this phone so that's set. So that just leaves shutter speed. To get a non grainy photo it has to lower, which can result in blur with a moving subject or shaky hands. However this is a better option because if you can get a crisp on its great. If it were higher ISO it would be crisp but so grainy it's pointless. This transfers to all cameras even pro ones. The only 4th component you can add is flash, this can use the slow shutter speed but freeze the subject. And honestly the flash on this has improved a lot. Now the Pixel does something in software I get that, but I've used it and can get blurry pics too if they are moving. As a pro photog in all the situations y'all posted I'd grab a flash even with my pro camera. The shutter speed would just be too low. Hope that explains a little. It's not a bad camera it's doing things right just sometimes makes it a little tricky but low light always is.
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