It's a good point, though in this case it's still more of a "take it with a grain of salt/this is a second-hand telling" than "these aren't Gura's words/feelings."
Also, wouldn't it be fair to assume she had editorial/review rights over the lyrics?
That, or she took no part in it at all. Which would've been hilarious as fuck.
But the bigger question is then "
Does Mr Edwards even know who Gura is and what vtubing is?"
(I actually don't know)