The playing field being referred to in this context isn't so much the price but the ability to pick attractions. Remove the cost aspect for a moment and let's discuss the way of actually choosing which rides to book. With Fastpass+ hotel guests could book at 60 days, offsite at 30 and people staying at club level had the ability to buy 3 additional Fastpasses. Even if you were staying onsite, if you did not know the ins and outs of the system you were not going to get the big rides like Slinky, FOP and Mine Train. And then there were guests going to WDW that didn't even know Fastpass+ was a thing before their actual park day. By the time that happens, the only thing actually bookable was Barnstormer for 7:30 pm.
With
Genie+, it's day of only. Everyone has a shot of getting the big rides at 7 am. Yes, there's the price aspect and you also need to be Disney savvy to get your moneys worth, but the fact that it's day of is how the playing field is being leveled.