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Many factors to consider. For someone brand new to structured training, the LV may well be the perfect fit and give great results.
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For some athletes with a prior LV history, and looking to grow without taking on the MV options, the LV is a good foundation that can be supplemented with more Endurance level workouts. It is also decent for those looking to add other activities like strength training or other non-cycling activities.
This, like everything else here is relative. LV can work well for many people, but is well short of what works for many others. Looking closely at individual history, nutrition, recovery, life stress and other training factors are useful when selecting any training plan, these included.