Reasons to Use Stone Golem:
High Survivability (Tankiness):

The Stone Golem is a tanky minion, boasting high life and POE2 Currency defense. It can take a lot of damage, which makes it a reliable frontline tank that can absorb hits from enemies while you stay at a safer distance. This is especially useful in boss fights or high-difficulty maps where minion survivability is crucial.
Sustained Healing:

One of the most significant benefits of using Stone Golem is its life regeneration ability. The Stone Golem grants your character a passive life regeneration bonus as long as the Golem is alive. This healing can be invaluable, especially in prolonged fights where you need to recover health between attacks.
Tanky Frontliner for Minion Builds:

If you’re playing a minion-focused build (such as Necromancer), the Stone Golem serves as an excellent frontline tank to protect your more fragile minions (like Spectres or Zombies) and you. It acts as a shield against enemies, allowing other minions to do their damage while you focus on staying safe.
Synergy with Life-Based Builds:

If your build focuses on life regeneration, the Stone Golem synergizes well. Since the Stone Golem’s life regeneration scales with your character’s life pool, it adds even more value to life-based builds. It’s a good choice for builds that benefit from high survivability, like Strength-based characters.
Simple and Reliable:

The Stone Golem is straightforward and reliable. Unlike more complex minions, it doesn’t require any special setup or specific conditions to be effective. Just summon it, and it will start doing its job, attacking enemies and providing support. This simplicity is what makes it a staple choice for many players.
Tank Buffing for Minion Builds:

As a physical damage-based tank, the Stone Golem benefits from many minion damage buffs found in the passive skill tree, support gems, and gear. Additionally, certain passives and items that improve physical damage or minion survivability can make the Stone Golem even more effective in tanking and dealing some decent damage.
Leverages Damage Scaling via Minion Mods:

Many mods on the passive skill tree and items that focus on minion damage or minion life can improve the Stone Golem’s performance. Minion Life and Path of Exile 2 Currency Minion Damage bonuses help keep the Golem alive longer while increasing its overall effectiveness.