Double Naught Spy
Sus Venator
The radical left winger militant antis use the exact same arguments. You really think we should be using the same tactics?
What tactics? When you have high profile individuals promoting a given cause and they behave like idiots, that behavior reflects back on the cause that they support. There are no tactics involves here, just public perceptions.
It may be a "silly" perspective as you note, but then again, nobody ever said that public perception was based on well researched and comprehended facts and logic. To the contrary, public perception is largely emotional. People get elected because of how handsome they are or how well they dress. Some people get elected simply because they are from a given party, not because the people voted for them considered all the political considerations when casting a vote.
It really doesn't matter if that person is representational of the population or not. It gives the cause a bad association in the public eye that can hinder the efforts of the cause.
The bottom line is that when you are promoting a given cause or candidate, you don't want individuals that are idiots and nutcases out front to promote your cause.