AZ in Colorado Springs
The front of Minwax cans of stain says, "Penetrates, Stains, & Seals." I've advised plenty of people at the USAFA hobbyist woodshop that their finish deteriorated because of no finish coat. "But the can says it seals ..."
Marketing was invented to drive the masses towards certain products. If they mislead and confuse, the sales department certainly loses no sleep over it.
There was a Dilbert cartoon in which the punch line was "in five minutes an engineer can ruin a six month sales campaign."