"As the artist intended" and "hear the original tune" are myths propagated by those who have little knowledge of what it takes to produce a studio recording.

Unlike broadcast television and commercial cinema, there are no standards for recording music commercially. Tonality and dynamic range can vary wildly even within the same album release.

There's no way to hear exactly what the artists intended or the original tune (actually it's the mixing and mastering engineers as often the artists have little to no input into those processes) unless you've got the exact same equipment and acoustics they had.

At the mixing and mastering level, it's not about original intent, but about what will sound good on the vast majority of a wide variety of equipment that consumers own.

So, by all means use EQ to correct errors in frequency response or even for one's own personal preferences.