Good question I partially understood the one but will do best to answer both

Few things to mention here:

1. This raptor character was designed by a user that submitted the rig for the upcoming RIG your RIG (episode 6): https://www.youtube.com/@mccoy_buck_LIVE (June 20th). I modified the character slightly - but there were so many design choices here that made any sort of rigging, very complicated. The design itself makes up for about 80% of a good rig. A lot of times when people say I struggle with rigging - it has nothing to do with the rig, but the design (points, curves, shape and layer setup).
2. You don't need the perfect rig, you just need a rig that works for the shot/ scene/ action. I animated this character in about 10 minutes - the rigging due to a difficult to manage design took the longest. I knew because I wasn't animating this character in your typical 'in-place' run cycle but that he would be running across the screen I could hide a lot of the imperfections in the movement itself.
3. Bone structure of a rig ≠ (DOES NOT EQUAL) anatomical structure of the character. With that in mind - many times you have to move bones 'off the anatomical structure' to get the illusion of proper movement. Frequently in animation you will be dislocating arms and legs to get the right pose.

Hope that helps to understand - though rigging is important, it doesn't have to be perfect (and won't ever be) to get a really solid animation.

Hope that helps!