While I do agree that Lebron is doing great job, the whole "for a 39 year old" doesn't really make sense to me at all. He is averaging 23.3 points per game, 9.2 assists, 8.6 rebounds per game and he does that with 51% fg with 43% three pointers as well.
So he is not really scoring very little because he can't, he is picking his shots but having 9.2 assists meaning that he is passing his chance to teammates to bring them higher this year, to give them a bit more confidence.
This is why I honestly believe that he is doing great for any age, it's not just great for 39, that makes it sound like if a 25 year old kid did it we wouldn't care this stats, but when a 39 year old does it we care about it. That's not the case, if you see 23-9-8 from anyone with 51-43-76 splits then we would say that's a good player and that is why I believe that we should not be really considering his age when complimenting his age. Lebron is definitely the GOAT and he is proving that every season.
I do not think that people are saying that for a dig at him, I mean he is doing great for a 39 year old is usually said because any season he has, could be done better by most superstars, but to be able to still do that at 39 years old is definitely shocking, that's what people are talking about.
Nobody is saying that his stats are bad for a 25 year old but great for 39 years old person, what they are trying to say is that we have never seen a 39 year old person playing like this, hell I am not sure how many players were still starting games at 39 years old, Kareem did, but not many else I can remember to be fair. So the fact that he is doing this at 39 years old "adds" to his amazingness, if a 25 year old did this then it would be boring, like Giannis could have better stats, that's not really a shock to me and nothing to talk about, of course they could do better stats too, there is no news there, but when a 39 year old dude does what a 25 year old could do, that becomes a news and a shocking thing to see.