That's largely correct. LF is highly methodical, one often gets only one chance at the shot before the lighting changes, and the cost of film and extra effort hauling the bigger gear around favors optimizing every single shot and wasting as little film as possible, though there are a certain number of LF "machine-gunners" out there too.
Every time the shutter clicks it's like the "ka-ching" sound of a cash-register drawer with another five, ten, or even twenty dollar bill disappearing from your wallet. But a background in LF makes one more thoughtful and careful shooting even roll film. But at least with roll film, it's quite realistic to shoot a spare frame or two just in case.