have emotional problems?

I recently read Sleep-deprivation causes an emotional brain 'disconnect' and to be truthful really scared me. My entire life I have not gotten enough sleep because I like staying up during the night. This shows emotion problems and higher chance of stress if people don't sleep and that seems a bit off to me because most people don't get enough sleep at night. I know I don't, but as the study shows the less sleep I get I become much more stressed angry and sometimes I get scared of really random things when I don't sleep. I also noticed it was right about body functions, if you ever stay up a long time you should try doing something that takes a lot of coordination like sports or video games you just cant do it as well. I think their test is for the greater good and overall very useful to show kids that don't like to sleep so that they go to bed earlier, but I don't think it's very important to have. I can understand things like this are what they study on so people know more but it seems like they could be researching on something more useful like diseases that need cures or other things that could help in making people and animals live longer. This study is useful but not all that necessary and I think they could work on something more important.