The problem is that no company I’ve ever worked for implemented the well architected framework with their AWS environment, and not one company will ever invest the time to make their environment match that level of quality.
I think what you describe with the web tool to discover user permissions sounds a lot like the AWS VPC Reachability Analyzer which I had to live in for quite a while because figuring out where my traffic was getting blocked between an endless array of AWS accounts and cross-region transit gateways was such a nightmare that wouldn’t exist with GCP global VPCs and project/folder based permissions.
I don’t like the GCP console, but I also wouldn’t consider a lot of the AWS console to be top tier software. Slow/buggy/inconsistent are words I would use with the AWS console. I can concede that AWS has better documentation, but I don’t think it’s a standout, either.