I have used marine goop on kites and it seems to be fine ... it does take longer to cure than kite- fix, a hair drier solves that problem.
Whatever glue you put on your kite will scrap it or cost twice as much to repair professionally after your trip. Keep the goop for your shoes
You are probably right and note that I was just helping comparing the Goop with the Aquaseal and the Gluefix but I never use them on my kites. I love the Goop but for many other non-kite related repair. If I have to do a repair on a kite I prefer to use Kiteaid as I feel it does a better job.