Mainly because life is short. At mid 50's half the folks in the obituary page are younger. Most of the 70 something's don't cook out or get around to well. Jump in with both feet and get yourself happy. How can you tell when you've reached "happy" in the bbq grilling world? When your wife surprises you with a Primo, when she searches Craigslist for grills while your at work, and takes food photos for you or asks you to take a photo if her plate.
It's all good. If an Hibachi gets you where you want to be in patio culinary world, well I recommend you have at least three ;-)
Primo XL, Pit Barrel Cooker, Tiernan SOB, Mini WSM, Big Green Egg Mini via Craigslist, 5 others, Black Thermapen