warrrl, I do understand your confusion at someone telling you your basement was never built to be finished into living space. Here's the abstract from the link above.
"Buildings used to be constructed over cellars. Cellars were dank, dark places where coal was stored. People never intended to live in cellars. Now we have things called basements that have pool tables, media centers and play rooms. Cellars were easy to construct – rubble, stone, bricks and sometimes block. If they got wet or were damp so what? Basements are different. They are not easy to construct if we intend to live in them. They need to be dry
, comfortable and keep contaminants out. Basements are viewed by many as cheap space that can easily be incorporated into a home. Keeping basements dry, comfortable and contaminant free is proving to be anything but simple."
When most people think about a damp basement they think about "water". In reality, "moisture vapor" is the really big problem. It goes right through concrete and even right through the "Drylok" (by design) the topic of your post. Now, even though moisture vapor is a slower mode of transport, it is persistent and if not managed it will try to equalize the inside of your basement to become equally as wet as the soil outside. Thus I like the advice not using a vapor barrier and running a dehumidifier to manage what moisture passes through.
It is tempting to disregard internet advice, especially when you don't want to follow it, but the people who wrote that article, and many more aren't idiots and have thousands of examples to back up their advice. They also have no financial interest in making those statements where the people who roll the dice and sell and remodel problem basements do.
If I have raised your concern, then I have done my job. To your benefit, many basements are remodeled without following the current best advice and they do just fine. But the ones who have problems, have major problems. Mold is a nasty 4 letter word.
Do read that article and follow some of the references, they do provide good advice.