Why do you actually use Poly?

4.5 level.

I'm a gear-aholic, rackets, strings, bags etc. started to be more honest with myself and test different string types, after using poly for most of my playing time.

I was using a racket strung with stock syn gut, and I could produce near the exact same spin that I would using my poly. Granted this was only for 30 mins, and I normally break a poly normally takes 12 hours ish for me.

I genuinely couldn't tell the difference, so now I'm questioning why I even use poly going forward.

I see so many 3.0/3.5 at my local club using Hyper-G/Alu Power/RPM Blast, and my question is why?

I see people on here say they hit with 'heavy topspin' at a 3.5 level, but from what I've learnt in tennis, until you play against 5.0+/ex-pros, you don't actually understand what top spin is. The heaviness of an advanced players ball is insane to imagine as an intermediate.

Is this just proof of marketing?