What is the point of heavy boots for hiking?

Adventurous terrain

Lighter hiking shoes or boots are suitable for shorter or easier trails. However, for more challenging terrain and longer hikes, heavier boots are a better choice. Heavier boots will help you carry heavier loads and absorb shock while providing adequate support for your ankle.

As mentioned above, when you are wearing gear and hiking in the mountains, heavier shoes will offer you more protection. When hiking over terrain such as muddy passages, rocks, and bushes, you really need to consider the footwear. The soles of heavier boots will help support your weight when passing through rocks and mountains.

Better support

Heavier boots are made of materials designed for tougher conditions, such as more advanced hiking terrain, but also for more ferocious temperatures, such as rain and snow.  The soles of the heavier boots provide better traction for your foot.  

In addition, high-cut shoes will help prevent abrasions and scuffing when hiking on rougher terrain. The high cut will also provide better support to avoid sprains. Finally, if you've already injured yourself, heavier, high-cut boots will give you extra support to avoid another injury. 

Other key advantages

In summary, the main benefits of heavier hiking boots are stability and greater durability. While they may require a longer break-in time, they will likely not only be more durable but also more suitable for hiking in temperatures like water and snow. Finally, heavier boots offer better support and traction while helping you carry heavy loads, like camping gear.