"Better" is a relative term. Not every ball out there is "better" than the last one, but it will be for some.
The average recreational bowler is woefully uneducated as far as the marketplace. Many show up for league, see their buddy has "the latest, greatest ball to ever roll down the lane", and convince themselves they need one too. Not knowing any better, they visit websites, read all the BS hype and marketing, and buy into it without analyzing it.
Ball companies dont care about bowling, nor do they care about bowlers. ALL they care about is selling as many of their products as they can, by any means they can. If making stuff up and hyping things to make them sound great so be it.
In truth, most marketing claims these days are exaggerations, if not flat out lies.