You mention elsewhere that you are 23. This means that for as long as you have probably cared, the Internet has existed. As such, you have always had relatively easy access to questionable answers to odd facts and such. Life was not always so.
Many folks (myself included) started reading Cecil’s columns long before the public Internet came in to being. It was so cool to read a newspaper column where someone could ask “Is it true about Catherine the Great and the horse?” or “Did a French vaudeville star once specialize in trained flatulence?”. Subjects like this were almost taboo in mainstream newspaper columns. This desire to answer virtually all types of questions with a bit of snarkiness and attitude is classic Cecil Adams.
In time, various forms of discussion around the columnist appeared on the Internet, attracting the people who were originally only fans of the column.
There has been a progression through forum technology here: newsgroups -> AOL -> various web-forum products. I have only been around during the use of vBulletin, but many dedicated folks have been around since the first peep on a newsgroup.
These days, I suspect that a substantial fraction of the members here did not come here via the columns/books.
That, in a nutshell, is why this gentleman is respected here: He is the seed crystal around which this community formed.
Your question is kind of like going to a rock star’s fan site and asking why everyone likes the rock star so much.