For developers to be efficient to solve a bug, they need to be able to reproduce the bug on their environment. Otherwise, you get the "it works for me" answer.
The bug report should be:
So by using profiles, two people with different setups are trying the same thing.
The bug report should be:
- Install profile X
- Find/create/enhance a profile which has sample data and a configuration.
- Go to URL Y
- Attempt action Z
So by using profiles, two people with different setups are trying the same thing.