I have never once in owning maybe 10 different new bikes taken them back in for the first scheduled service. I have also never once been questioned about doing the first service myself when I took the bikes in for any warranty service.
Here is one example of why I do it myself (and this is a reputable dealer).
When I had my bike on the rear stand I noticed that it was leaning to the right. I wondered why. Upon looking at everything I discovered that the spool attachment point on the swing arm had cracked and was spreading. I immediately took it off the lift. I count myself as lucky that I was able to get it down before it fell. A few days latter I could not get my key in the ignition. I tried everything, soaking with different oils, using pin, compressed air, you name it, without success so I called my local dealer where I bought the bike to come get it. They were quick to respond with a truck and 2 teenage boys. (Mistake one) The problem was that the bike was locked with the wheel turned and they had not brought any type of dolly so I had to make one from a set of wheels I had so that the bike could be rolled onto their truck. The shop could not get the key to work either so they ordered 2 new lock set (give credit to them for not trying to just replace the ignition switch only and forcing me to use two keys) and installed it. They also removed and welded the swing arm. I picked the bike up after about a week and drove it home. Upon examination I noticed that the rear shock was on backwards such that the rebound adjuster was now on the inside rather than on the outside. In that position there is no way to see what your settings are so back to the dealer with the bike. They were very apologetic and assured me that they would have the mechanic check the service manual and make sure it was installed correctly this time. The next day I went back to pick up the bike and the first thing I see is that the rebound adjuster is now on the outside where it belongs…BUT the shock is on upside down. I never said a word as I was tired of asking a neighbor to continually take me back to the dealer to pick up my bike; I just drove it home that way, removed and re-installed the shock properly myself. I would bet almost anything that the one of the two pimply faced teenagers were assigned to putting the shock on both times. They probably are not stupid kids, just young no experience, trying to do what appears to be a simple task but without any prior training and making minimum wage. Sorry, but I do not want that type of person working on my bike…especially at a rate of $84.00 an hour, so with the exception of value adjustments, etc., I do all my own maintenance. I do not attempt things I know I am not qualified for (a man must know his limitations) but I am meticulous about doing the things I know how to do correctly.