Yes, you can do an in-water return without palm rolling, and if you've been doing it that way for 60 years, I'm sure you're proficient with that technique and would have no particular reason to change what you're doing. When I write about technique, I'm usually focusing on newer paddlers.
That said, I started canoeing when I was eight and wasn't really focused on palm rolling until, just for fun, I took instructional at the 2009 Adirondack Freestyle Symposium taught by Tom MacKenzie and Marc Ornstein, among others, when I was 64. Since then, I've begun using palm rolling quite extensively, not just for silent Indian strokes, but for Canadian strokes, Northwoods strokes, and turning maneuvers such as what is called a Christie in freestyle lingo. I find that the palm roll is easier, more efficient and less stressful on my wrist and forearm for certain of these strokes and maneuvers.