Agreed. I cannot imagine why information is not accessible to the member.
It can be useful to have a private note for the admin, even mods. But to display something to all members? Someone will tell the member concerned so what is the point?
The profile is member_view template. As I already said. That edits all profile pages. member_view.css edits stuff like colours.,
Experiment with the css one at a time on the css page. It will show on a tab beside the main template.
Change one item to a totally unusual colour for your site if you're not sure what you're changing. Then it will show up easily.
Ask how to use a conditional show selected colours on your own Profile page, but not on others.
That will avoid misunderstanding.
It may be useful to copy the member_view.css and make a duplicate perhaps member_view_me.css
Then you could bracket the whole of the content area in a conditional which works this css.
I'm not quite able to do the conditional either, sorry but I can see it could be done.
The conditional might work off the title line at the top of member_view
to link to the alternate css if the user ID is yours. Something like that.