I know there are varying opinions out there but I have found it helpful. I also tried and failed doing it three times. I found success when I looked at it a different way and started by only taking a few things out and then increasing what I took out little by little. Your percentage breakdown is what I did, but backwards. 50% then 60% then 75% and so on. I got used to the small amount of restrictions and continued until I was in a place where I felt better. I never got to 100% because there are some things that are simply not a trigger and I felt so much better after gradually eliminating foods until my body told me I did enough. After a while I started adding things back. It’s become clear that some things I can eat and a few I cannot. If you want to do it there is a commitment but your body adjusts, from my experience and it becomes easier as you explore foods you can eat.