I just came across this post so I apologize for such a late reply. I have chased a handful of hurricanes ranging from cat 1 (Hermine) to cat 4 (Irma). Honestly, I do it for me. I just enjoy it. I don't ever go trying to pretend I'm doing anything that I'm not. I'm not pretending like anyone NEEDS me there. I just want to experience the storm, ultimately. That said, I don't ever like to feel useless so I do make a legitimate effort to be helpful in whatever ways I can. I have performed rescues before where trees had fallen on a truck, trapping the driver inside, and I will do that in any scenario that arises, but I'm aware that there were others (LEOs) who could have done the same had I not been there. I just happened to arrive first, by chance, and had the gear to cut the trees and remove the driver. I was also chasing with a firefighter and I've got some first responder experience as well so we were aware of how to deal with that particular situation. I also take measurements as I'm sure many of you do and provide consistent updates to the NWS and other entities that need to know. At the end of the day though, those actions are just a byproduct of what I'm there for which is to intercept a hurricane solely for the interest of experiencing and documenting it. I'm sure people would get by just fine and the NWS will have as much info as they need so I know they don't need me to be there, but since I have some personal desire to be there anyway I go ahead and make whatever positive contributions I can. I guess what I'm saying is to just keep things in perspective and do your own thing.
Edit: I saw what Warren Faidley said about things he won't do in hurricanes and it reminded me. I think it's very important to plan your chase for a hurricane more than just "this is my target area". During Hermine I will admit that I was mobile the entire time and it worked out fine being a weaker storm, but even being "just" a cat 1 we still found ourselves in hairy situations with trees falling all around, about a dozen tornado warnings right on us, transformers exploding, and the usual hazards from wind and rain. For the stronger hurricanes (Irma, Harvey), I actually researched locations to set up in a sturdy building where I wasn't in imminent danger of the surge. It was still very intense as our hotel suffered some moderate damage and the ground floor had minor flooding, but we were able to get what I was there for and do it in a relatively safe manner and made it home after a few days. Plus, take extra gas. That has been the biggest lesson I think I've learned. I had one bad experience years ago because I didn't prepare adequately and that lesson has been incredibly important since then.