The word you're looking for is cannons.
But yeah, some strategists are speculating battleship-style dumb projectile warfare will make a comeback as point-defense technology outpaces missile technology.
I would not call modern artillery bombardment techniques "dumb" by any metric but sure.
He means they're not guided. Not that they're stupid.
I'm pretty sure the point was that some/a lot of modern artillery isn't generally dumb, at least by first-world standards. Like, look at the Excalibur, it's a long-range GPS-guided 155mm shell with absurd precision.
And I suspect it costs about as much as a missile. In comparison, "dumb" munitions can be a lot cheaper and can overcome point-defenses just by the amount of them deployed.
M982 shell: $68,000 US.
MGM-140 ATACMS: ~$800,000 US.
Tomahawk cruise missile: ~$1.5m US.
Yes, those are the per-unit costs. So both a short-ranged ballistic missile and a long-range cruise missile are more than an order of magnitude more costly than a GPS-guided artillery shell. And yes, more destructive and longer-ranged (the ATACMS has about 4-6x the range and there's no point even comparing to the Tomahawk). But it's also a much newer system and the cost is much lower than it would be if it were scaled down based on warhead and range. Numbers I've seen on the cost of somewhat smaller WWI-II dumbfire shells are in the $30 per unit range, yes, they're astronomically cheaper.
But that's sort of the question you need to ask. Do you want to deal with a problem by dropping one shell right on top of the target even when friendly forces are within 100m without worrying about falling short or collateral damage, or do you want to level everything in a three-block radius and still maybe not even hit the target directly?
Obviously if we get to the point where targeting systems are precise enough and we can field combat-functional railguns the costs will drop, but guided shells are an intermediary that fill a gap where you're questioning whether it's worth spending literally hundreds of thousands of dollars to nail a couple guys in a house but don't want to kill a bunch of civilians and maybe your own infantry.