If I go looking for a directory of [service, in my area] that’s hardly an ad! If those include, say, reviews and pricing info, great! Yes, please!
I definitely don’t want that directory to be skewed with ads in favor of those with the most money, or who have decided to burn the most of their limited resources on ads instead of improving their services, lowering their prices, or hell, just taking more profit. The ads were the biggest problem with the good ol’ yellow pages.
Even in the phone books of old, you had ads as part of the directories... Businesses paid for those listings... Even today's equivalent, yelp, etc. are trying to sell add-on services to the businesses and can harm your businss if you don't pay up for the features.
And who puts together this magic directory, without pay?
Oh you sweet summer child.
Retail stores are basically rooms full of ads. Those end isle displays? How much shelf space allotted? Eye level shelf or bottom shelf? Distributors pay for that. The whole damn store is advertising!
You mentioned catalogs above... catalogs are almost pure advertising.
Looking for a directory of [service, in my area] ... you mean like the yellow pages? That were a literal giant book of advertising that companies paid for?
Spend some time in retail technology. The world does not work the way you think.
Your definition of ad is too narrow then, because those are all different types of ads. A store advertising its goods or even having billboard ads saying the store is at such and such street is, well, an ad.