A level chemistry benzene ring NMR help

I understand that benzene on its own has 1 proton environment because they're all identical. But why for example, in benzoic acid or a molecule where a benzene ring is attached, does benzene only have 1 proton environment??
because wouldn't the carbon in the benzene ring that is attached to for example the C=O group have a different proton environment than the other carbons in the benzene ring that are attached to the adjacent carbons in the ring? Because there would be adjacent protons on the adjacent carbons in the benzene ring, but for the carbons in the benzene ring attached to the C=O bond, they would be bonded to a carbon with no protons, and a carbon adjacent to it in the benzene ring?

so for this example i would expect 3 different proton environments in the benzene ring of benzoic acid but why in markschemes and places are there only one peak caused by the benzene in a complex molecule??

thanks

The simplification that you will use at A level is that all the H atoms attached to the benzene ring will have similar shift values, so are counted as all in one environment. The problem we are simplifying is the issue of the rather splitting patterns produced by phenyl H's, which are considered too hard to interpret at A level (and rightly so).

Ash8991 is correct, the phenyl carbon with the COOH attached does not have an H atom attached.

There is also a chance that you are confusing H-NMR and C13-NMR.

Thanks