<font face="Verdana, Arial, Helvetica, sans-serif" size="2">Buying a ticket on-line is like going out to dinner at McDonalds. Buying a ticket from a travel Agency is like going to dinner at a nice restaurant and you are glad to pay the 15% tip. </font>
That's a complete strawman. In either case, the product (travel on Delta Airlines) is the same no matter how the ticket was purchased.