Easier and better? I can't agree with that.
By the time I take the bike to the dealer, have a friend follow me there and then take me back home and then back again to pick up the bike it's definitely not easier.
As far as better goes...the dealer isn't going to put their top mechanics on an oil change. Some minimum wage punk who doesn't care about your bike will be doing the work. He won't care about scratching you body panels, breaking off tabs or cross threading screws. There's also the stories such as the guy who changed his oil out early and used a Fram filter, took the bike in for its 600 mile service only to find out it still had that Fram filter in it when he got home.
First service consists of changing the oil, adjusting chain tension and checking the torque on various bolts. Basic hand tools and a torque wrench is all it takes. It's nothing but basic maintenance that every bike owner should know how to do and the typcial dealer will charge $200 to $300 for this "service". It's like paying someone a few hundred $$$ to rape you.
As far as warranty issues, there are laws in the US to protect consumers. As long as the required maintanence has been done, whether by the owner or another mechanic, the dealer can not refuse warranty service. If the break in maintenance was required to be performed by the dealer they would have to include it in the price of the bike and not charge extra for it later on.