It is true. We were all noobs once. We all started from 0 some time with weapons that you now see and provoke laughter.
However, after months or years of effort we managed to reach a certain level. Then you cannot ask a pro to come back to the beginning again. It's like asking a doctor or a lawyer to run the race again because the rules have changed.
Personally, like many, I have returned to play in 1x1, like noob. I don´t like. I get bored. I was a 3x3 player. I feel like I've stepped back. That everything I did and what learned, was taken away.
I continue in the game and strive, for my clan and my friends. But frankly, it bores me a lot. And it will be a long time before I can play again and be competitive in 3x3. I don´t know if will resist so much.