Is streaming actually that stressful or intensive? Not just talking about Botan here, seems like just about every JP vtuber has come back from the doctor's office with something like 'doctor said that streaming is causing me crippling life problems'. Usually it is related to the voice, which is more understandable for singers and people who talk non-stop for several hours a day, but... still...
A healthy person could stream as much or more than the average Vtuber without any health issues, however the average Vtuber is a head case with an already unhealthy lifestyle, the brain bugs make them stress out even more than than a normal person, most are women (the biggest handicap) and many Vtubers are approaching their thirties (or beyond) which is when all your bad decisions start catching up to you.