I think it's key to remember that controls like eq gain wouldn't allow you to boost or cut by more than a few dB if you weren't supposed to ever do it. That said, if you're regularly cranking eqs all the way up or down, you either have a big problem with your tracks/ mic selection, or, you better really know what you're doing. Well recorded tracks don't need more than a few dB boost or cut in any frequency range as a general rule... tone shaping as opposed to major tone correction. A great analogy is that most wounds can be healed with minor medical treatment like a bandaid, while some injuries require an operating room and a whole crew to fix them. Minor work happens all the time, and if you're lucky, you avoid the major issues quite often.