the purpose of interlocking pavers is that they CAN be set on a properly compacted aggregate base using the proper geo-textile fabric. Interlocking pavers are the 3rd oldest profession. This is what roads were built with at one time. And go to Eurpope and you'll see pavers everywhere you go.
As long as the base is properly prepared/installed/compacted - the pavers will never move.
The person that told you that is not properly apprised of pavers.
Or, some people think it's a big expense to remove concrete - so they'll say they wanna veneer the slab, thinking they're saving dinero.
The ground moves in the winter. Anything mortared to a slab on the ground is subject to freezing and popping loose.
All these big mansions with elaborate brick porches and flagstone patios and pool decks - sooner or later they will have to have many of their brick / stone reset. It's just a matter of time before ice forms under the brick/stones, freezes, and pops.
"It's You vs. You"
"People Throw Rocks At Things That Shine"
My Equipment Brag List:
-1 CAT hat
-16 pairs of Hanes socks (the Heavy Duty model), many with holes.
-12 pairs of underwear, ranging from Joe Boxers to Jockey, many are in need of replacement. (no more photo requests please)
-hundreds of t-shirts. Some w/ grease stains, some torn & tattered.
-7 pairs of jeans, ranging from Levis to Polo to GAP. 1/2 of them have holes in 'em.
-1 pair of old worn out Nike shoes.