If it is just the inner boot small clamp that is leaking, wouldn't just replacing the clamp / fixing the leak solve the problem? Maybe pump in new grease if enough came out before the problem was found???
Good to hear of your experience on no ripped boots. My '99 with 230k is all good, and my '11 with 80+k was great until the dealer sabotage.
Here are my POV. I see this issue with almost every Honda. I don't know if the clamp is actually loosening or the rubber boot is dry rotting, drying or shrinking.
Whatever the reason, what you are proposing is what I consider a hack. Not in a bad way, its just something I don't do.
Same thing with a brake job that is just a pad slap. I just don't do that. I don't want the responsibility, nor do I want to redo the job later down the road.
If I work on an axle I will properly rebuild it or replace it. For rebuilding, you need a new boot kit, new grease and new clamps. I break the axle into smallest
assembly pieces, balls, inner outer cage, tripod joint, cup, axle shaft and all C clips, and put alignment marks on everything, including which ball came out of which
slot. Everything gets cleaned until no original grease remains. Metal surfaces are inspected for pitting and wear. Then the axle is reassembled with brand new parts.
I don't replace boots on the car, I don't inject the grease, I don't put split boots.
Another common theme seems to be vibration that comes with age of the car. There were multiple reports that replacing axle assembly actually fixed that, so
for added benefit, I just don't bother rebuilding Honda odyssey axles.