Not necessarily. You don't have to send the machine back to Robinson, instead you can take it to any licensed Overhaul shop and have it rebuilt. The overhaul kit that Robinson sells for this purpose is far cheaper than a factory rebuilt, but it doesn't include the cosmetic items such as upholstery. It is then pretty much up to you if you just want the mandatory overhaul items done, or if you want your machine to look like a new one. Only the life limited parts have to be replaced, and only if they are actually timed out.
For example, rotor blades often don't make their 2,200hr life and get replaced earlier. If your blades are only 1,000hrs old when the rest of the machine is due for an overhaul, you can buy the kit without blades and just keep using your old ones for another 1,200hrs, or until the calendar life expires.
It is quite common for older machines to have parts due replacement outside the regular 2,200hr intervals for this reason.