Sure, I'll explain my disagreement. First, as a point of reference your original post read ...
"He’s never been as good as we wanted him to be, but people are completely nuts if they think the roster gets better "when a 5th year Senior QB transfers. It’s the height of fan stupidity."
First, you said it yourself ... "He’s never been as good as we wanted him to be". There is no reason, after 3 years, to think that he can improve to the point of becoming a top level SEC QB which this team needs in order to step up to the next level. It's time to move on to another QB and we have plenty of viable possibilities (see below).
Second, JG will only be a distraction and a potential source of player dissension with pro and anti-pro JG supporters (however, I would be surprised by any player dissension). Besides, I think JG would benefit from a fresh start at another school just like Peterman did at Pittsburgh.
Third, I strongly disagree that those that disagree with your views are "nuts" or even worse "stupid".
Now, the remaining QB's and their strengths and why JG might not be needed.
Kasim Hill started 10 games at Maryland before he suffered an ACL and he was 4 star out of high school so he has some potential.
Brian Maurer showed glimpses of brilliance this year. The team seemed more motivated and moved the ball when BM was inserted into the game. Unfortunately, it seemed like every time Brian got going this year he got injured or was pulled after a bad series. The staff had Brian on a very short leash this year and had he been given more time to work through his youthfulness JG might not have been needed this year.
JT Shrout. Hmmm ... he has a great arm but I just don't know.
Jimmy Holiday might be a sleeper for the QB position. He certainly gives us a great RPO QB which seems to be the way college football is and has been heading.
And finally, Harrison Bailey. THIS. HB will be the starting QB from Day 1 next year and absent an injury he will play the entire year and beyond. Book it. He is the caliber of past freshman QB's like David Greene, Jacob Eason, Jake Bentley, Jake Fromm and the best, Peyton Manning all whom started early.
In summary, IMO the roster isn't improved or seriously hampered by JG's presence on the team. If he leaves, however, I think he will be better appreciated somewhere else and we will have another scholarship available.
Now it's your turn. In your opinion does JG improve our roster next year and secondly, why am I and others that might agree with me nuts or stuprid?