I get really tired of them trying to make one of the modern drivers as the greatest ever. Their comparisons get quite annoying. It seems as if they want somebody/anybody in IndyCar to be to the greatest, as long as it's not somebody from the past.
I've got a personally shot video tape from 1981 on pit lane at Michigan in which Mario Andretti asks teammate Gordon Johncock about their team owner: "you know why he's an a******? Because he's an a******."
Using the same thought process, you know why past IndyCar greats are considered legends? because they're legends.
I think a lot of it stems from too much focus on statistics these days. All about the numbers while ignoring the cars' reliability and myriad of other factors that changed over the years.
On the other hand, it might be a conscious strategy to make the domination look more interesting to the viewer. Same as F1 did in the Hamilton era, when we've heard constant talk about chasing yet another record.