Over a long career you have the opportunity to meet a lot of people and build relationships. Many of these may be in passing and soon forgotten, others leave a lasting impression and may become part of your network.
When I was young and immature (just yesterday) I used to think instructions were for the not so smart people. Why would you need instructions, you just need to look at the picture on the front of the Lego box and build it. As I got a little older it was bigger things, but I still had the same mentality – do not look at the instructions unless everything you tried failed.