Your points are well taken and offer truth. This thing, very real, in your face: getting older.
As an old guy pushing seventy, you might imagine what some of my reponses could be. Suffice it to say that as time rolls on, all the good observations you make will require adjustments. I mean, you have to adjust or it can be pretty tough. Your tongue in cheek outlook of course is the right tack. Oh and always remember: enjoy the hell out of it , others opinions be damned, smile at yourself in the mirror, and never stop making yourself a better cup of tea (or coffee, or tequila...).