What I was saying was that it can be a problem since a rather large amount of current is running through it under normal circumstances. If there is an issue somewhere else and e the fail safe system (fusible link, fuse etc. ) fails to mitigate the problem, the potential for a melted gauge goes way up.
A melted amp gauge is not the fault of the gauge in any way shape or form. But, if it's only designed to handle a certain amount of current before it fails, any added, unregulated or extra current is going to be a bad scene, no?