Yes and no.
Like, if someone was to say, “Running is good for you.” You might respond by pointing out the very elderly, who are at risk of falling and breaking their hip, people who are wheelchair bound, etc. and so make the claim that, “Everyone’s different. You can’t apply a one-size-fits-all solution.”
Well, yes, but running is good for you. That’s a one-size solution that’s true for basically everyone and for the people for whom it isn’t, that fact is obvious and readily apparent. There’s no mystery to them about the fact that it’s “general guidance” and, specifically, general guidance that doesn’t apply to them.
Feeling like the statement is an absolute law and that anyone who doesn’t obey that law or conform to that law is in “violation of the norms of society” would be a bizarre and irrational view on the statement. A healthy, rational guy in a wheel chair understands that it means that he should push his chair around with his arms and do so at a good enough clip to get his heart rate up.
When I see someone with some bizarre interpretation that nitpicks the thing into gibberish, my general take isn’t that the guidance is incorrect, it would be that certain people, guided by personal fears, cravings, or other proclivities will use any niche or dent to resist the things that scare them. If they fear physical fitness, they’ll see the guidance and search for a rationalization that allows them to avoid it.
If you have celiac, if you have diabetes, etc. or other special medical needs then yes, you may need an individualized nutrition plan. Past that, there’s some minor reason to think that mild variations might be better for different people - but mostly if you’re an athlete or someone who has specialized physical needs for the sake of their profession - but, largely, you’re supplying raw material to your body to turn into flesh, bone, muscle, blood, nerves, brain, and energy. There isn’t that one person whose body is 90% iron and that other person who is 87% calcium. Our needs are all relatively similar (in terms of ratio, not quantity) and while there is some difference in how well someone is able to process certain foods, there’s currently relatively low reason to believe that this has a huge impact on health, when you compare to the larger concerns of people just choosing to eat foods that are recognized as relatively unhealthy and/or in unhealthy quantities. That’s not an issue of dietary guidance, that’s an issue of culture and psychology. Most complaints about the dietary guidance are stemming from said psychology.