While I disapprove of putting the entire text of a profile in bold, it might be something that a person would do if they have trouble reading profiles that use the default font. I think that WikiTree uses 14px as the default font size, and a quick google search reveals that several authorities recommend 16px minimum. As one of the many family historians who are getting on in years, and don't see as well as I once did, I am inclined to think that 14px is too small.