Streams are useful - benched raiders can watch the progress to already know what is going on and how to handle mechanics if they are suddenly called in to replace someone, saves time explaining stuff again
I wouldn't say she's ugly per se, but I know what you mean. I think it's the massive over-emphasis on looks in her stream that deters me (admittedly she does have a nice rack tho!)
The best looking HS streamer I ever saw was at like 3am in the morning with 20 viewers:
I'd douse myself in petrol and lock myself in an incinerator to see nudes.