Absolutely, there's so many services and permissions that getting them to all work together happily can be complex. I work at a company where we have both AWS c

Absolutely, there's so many services and permissions that getting them to all work together happily can be complex. I work at a company where we have both AWS certified engineers and some very smart people in general, and there's been times when we spend ages trying to figure out why one particular service can't read data from an S3 bucket (or a particular folder in bucket).