What you pointed out is a nice analogy but more of akin to headband adjustments and pads or cables swapping, which can't actually damage the equipment.When you buy a car, do you adjust the seat, mirrors, internal decorum, radio settings or do you leave everything "as is" in order to preserve the "intent of the designer".
I think a better analogy would be "do you tweak the engine with a reprogramming chip to go beyond what the engineers expected?", which in this case can damage the engine if there is excess, just as pushing the volume too high or adding too much bass can damage a speaker coil if the amplifier has too little power reserve and clips or distort. So be careful. See this Focal article: Why do voice-coils burn out?
What I just mentioned is arguably a bit over the top or far fetched since more suited to power speakers and doesn't really apply here, but there is still a logic behind not relying on EQ settings.
Just like car engines, there is a whole range of speakers which have varied performances and it's preferable to choose equipment suited to our needs rather than choosing an equipment known as "performance or quality" and the then adapt it to our needs, although a slight adjustment shouldn't be a problem.
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