Really? I've been greasing every zerk I can find. It never occurred to me that they would have fake points.
From memory, I recall the three blade spindles which I believe you're talking about. The idler. There's also zerks on the three wheels which let you lube their axels. As I recall, there are three on the PTO shaft, 1 for sliding extension, and two for universal joints.
While I suspect John Deere doesn't, out of habit from my motorcycle days, I put a little bit of lithium on the PTO splines. I rationalize it might help reduce corrosion and make connect/disconnect a little easier.
What are your thoughts on the decks gear box? I had one gear box with 600 hours I was able to open and change out the oil. Another which has 1500 hours, I couldn't open. I suspect its never been opened. I'm still deciding whether I'll drill out the plug or just leave it alone until it fails ( if it fails). Hoping to get another 2000 hours on this deck, with a second engine.