This seems overly pessimistic, given that, in the USA, 16% of men and 19% of women have LVH.
LVH, even in the trivial state can cause a person to have a sudden death event. Therefore those with this disease should never be participating in sports of any kind, except perhaps golf. This disease is often times genetic in nature so all family members should be screened for the disease; sometimes it can be sporatic. If the LVH is due to HBP and the BP is gotten under control there can be some improvement because the LVH is not a true muscle disease of the heart. Some people live many years with LVH, some do not, especially if the disease is discovered during childhood. For some, a heart transplant is the only way they will survive. When the heart muscle is too thick, the cells can become irritated and that can lead to arrhythmia problems which is the reason for the sudden death events that occur; they are rare, about 2% of the population. An EP Study should be done to see if there are any electrical issues with the heart. If you have the Concentric form of the disease, you have a rarer form as that means it is covering more walls of the heart. The most common form only affects the septal wall between the ventricles. As with all true muscle disease, there is no cure for LVH, only treatments.