Some kids use their fake IDs to get into bars. If that is the case, having all your friends have one won’t get you want you whatever you want (at least if you want to hang out with your friends).
And again, I am not saying all kids who tell their parents they don’t have a fake ID have one. Just that some of them do. I am sure there are multiple kids who are the only ones on their floor not to have a fake ID. Again, maybe not your kid but they are out there.
In terms of the drinking age, I think one’s view of it is relevant. People who disagree with the drinking age will be more likely to view fake IDs as a non-issue. And again, that is just a tendency not an absolute.