The initial purpose for heavy weight drum hardware (pioneered by Tama) was designed for touring drummers. The increased weight provided substantially more stabilty in outdoor venues where the wind could blow over a cymbal stand. The design was soon also used for snare drum stands, tom stands, and hi hat pedal stands. A boom arm and counter weights were added to provide extra "reach" for mega kits used by Tama drummers like Billy Cobham and Simmon Phillips. Many drummers don't need the extra weight for securing their drum set ups, so most drum companies have now engineered lighter weight alternatives.
Some drummers may find it interesting that at the peak of the heavy hardware race, Tama developed models with
aluminum components that provided the tripod width for stability without as much weight.

Today, I could have close to two hundred pounds of hardware if I used all double braced, large diameter options. However, using medium weight selections, I have a hardward load of about 88 pounds nowadays. That's a saver for me. Not only with what I have to transport, but more weight results in more fuel consumption

. Plus, more bulk requires more cases, since I don't want to have anything I can't pick up by myself

.
Hardware should be a sensable choice of what you need and what you are comfortable with. It's a totally personal choice and we should all be glad that we have an incredible array of models to choose from now.