Is there an advantage to overriding the man command over the approach of just directly exporting the env variables in bashrc? I currently do the latter and I do

Is there an advantage to overriding the man command over the approach of just directly exporting the env variables in bashrc? I currently do the latter and I don't override the man function. I suppose overriding the man function would allow for man-specific customizations, but perhaps there are other good reasons too?