UCHANU: factory visits....

This past Saturday we had the opportunity to visit two factories--the Hanosimex textile and clothing factory, and the Yamaha motorbike factory.
After viewing a promotional, informational slideshow and hearing someone talk about Hanosimex, we headed over to our first production room where cotton was being turned into thread. It was really crazy to be in a huge room with lots of machines going, and to see a process that is necessary to make all of our clothes. However, after a while the loudness of the room and the, I don't know how to descibe it, cottony (?) air really started to get to me. I just wanted to get out of there. And this was after like 20 minutes. I felt concerned about the hearing of the workers, since no one was wearing earplugs and the noise was really deafening. I just can't imagine having to work in that environment for 8 hours...After leaving this room, we headed over to the production rooms where clothes are made from the textiles. This environment seemed a lot more pleasant to work in (comparatively, of course), as there was music playing, and the workers looked relatively relaxed. I even noticed one woman listening to music on her cell phone while working.
The Yamaha factory was also really interesting to see. Unfortunately, we weren't allowed to take pictures. However, I slyly managed to sneak a few...Anyways, I thought it was interesting to really see assembly lines for the first time in my life. We got to see pretty much the entire process of making motorbikes! I noticed the potential for injury with working on the assembly line, since it was common to see people having to lift large parts. I wonder if it is common for workers to suffer back problems, repetitive motion injury, etc. One thing that was really noticeable at Yamaha was that everyone on the assembly line (in the final giant room we visited) was male. This definitely contrasted with the sewing room at Hanosimex, which was almost entirely female.
Anyways, this experience definitely left me with some questions:
-why do some factories have better working conditions and follow regulations better than others?
-seriously...why would someone want to work in that thread production room if they could make the same amount of money or more farming?
-how do the workers at these factories feel about their jobs and their futures?

I hope that I can go back to one of these factories one day, talk to people, and get a better sense of the possible answers to these questions...