There is no consensus among academics about whether people should seek to make their publications least publishable units, and it has long been resisted by some journal editors. Particularly for people just getting started in academic publication, writing a few small articles provides a way of getting used to how the system of peer review and professional publication works, and it does indeed help to boost publication count. But publishing too many LPUs is thought not to impress peers when it comes time to seek promotion beyond the assistant professor (or equivalent) level.
Academics have differing opinions on whether authors should produce publications as least publishable units, and this concept has been criticized by some journal editors. For those just entering academic publishing, writing a few small articles can be beneficial in becoming familiar with peer review and professional publication norms, which does help increase the number of publications they have. However, producing too many LPUs is believed not to be favorable when aiming for promotion beyond the assistant professor (or equivalent) level.