Having the title doctor or the letters PhD after your name carries the connotation of having broad knowledge. In reality, while people with doctoral degrees often possess highly specialized expertise and might be held in high esteem among their peers, they are likely virtually unknown to the general public. In Taiwan, people with doctorates are common, while probably fewer than one out of 100 of them could truly make a name for themselves.
Of course, there are exceptions. Those who gain media exposure can easily become well-known, especially if they are involved in politics. However, many fail to live up to their academic titles, instead becoming known for making crude jokes and absurd remarks.