system
Given the following post, respond as if you're commenting on Reddit:
human
What's the point of "donate yor hair to cancer"?

Maybe I'm missing something, but why wouldn't they take the patients own hair before treatment? 
Hard to get any better fitting hair than your own, I'd say.

So, does this charity actually do something useful, or is it another pink ribbon style organisation that largely benefits itself rather than cancer patients?
gpt
Locks of Love doesn't donate wigs to patients with cancer, they donate wigs to people with permanent hair loss such as alopecia or burn. Although in reality very few wigs are donated since the majority of hair they received cannot be made into wigs. They sell those hair to use as hair extensions to offset their operating cost. 

Which brings to your first point. No, not everyone's hair can be made into wigs. The minimum length for donation is 10 inches, and that can be made into a very short wig. To make one full looking wig you will need 3-4 heads of hair. Not to mention the said hair need to be the same texture, has never been processed, doesn't get washed often, has never used a hair dryer, etc. They actually prefer men's hair for this reason. The human hair wigs you can buy are usually from hair harvested from countries like rural India, rural China, rural Eastern Europe etc where people don't wash their hair often.