The Google Image search isn't reflective of an actual car factory.. There are of course hundreds of workers there but final assembly facilities produce something like 1 car/minute. They're heavily reliant on robots - most of the parts move around the floor on autonomous transports, the stamping is all robotic, all of the frame welding is robotic, paint is of course robotic.

GM is of course tied in with the UAW, so they're going to be as favorable to labor as possible in their promo videos, but take a look at this video of one of their production facilities, this is reflective of the amount of manual input into modern automotive production:

https://www.youtube.com/watch?v=-Ow7gmZTIpo

You're using the wrong terms. Add "advanced manufacturing" to the query to get some idea of the current state of things. I toured a new automotive plant over 10 years ago and up until the final configuration stage, the only manual labor was cabling and quality control. This included sheet metal unloading and delivery (from rail), stamping of the chassis, welding, paint, installation of doors, hood, suspension, etc, powertrain installation, and many others. From my estimate, 2/3 of the factory was very close to being "lights out." The entire welding and paint process was fully automated and required a line stop to enter the area.

You are right, modern car manufacturers still use humans in assembly lines.

But to see how much robots actually do nowadays, compare that to auto assembly from decades ago when robots were new, or further back when they did not exist

Humans do the basic stuff that robots aren't any good at: pulling wires through, putting some pieces in an inconvenient place,etc. All the welding, painting and many others are fully automated.