Some stabilizers work better than others. Some are merely counterweights.
They can balance a bow, reduce torque and even help tame vibration and noise.
You watch folks shooting IBO and other stuff seriously, in the hunter classes.........you bet they run a stabilizer.
Some bows benefit from them more than others.
Tamed an 82# PSE Mach 4 back in the day with a home made stabilizer. Less than 12" overall......delrin rod with a 14 oz brass weight on the end. It worked GREAT.
My Blackwidow HS58 recurve needed some help, ran a K tech 3" w Mathews S coil module. Not cheap ($65) but it worked well enough (tell it was better with, than without).
My HF1225 recurve however, doesn't need one.
2005 Hoyt Protec ran an Alpine, which did minimal. Bow balance sucked too (needed more out front, was heavy enough already). I machined a brass weight and changed the cap......got it perfect.
Crunching arrows at 50 yards is kinda cool.....for a little while anyway.
This one tried to duck me at 45 yards. Not fast enough. Spined it and added a finisher after she rolled down the hill.