speed and spin is NOT a zero sum game. If you blocked for xu xin or Zhang jike, you would quickly realise their balls come at you with speed and spin at the same time. Yes, they can exist seperately. But it does NOT mean that if you get more of one, you automatically get less of the other.
its simply not true. Even some credible people have said something like this in the past that if you get more spin, you get less speed, etc. But its simply not true. Marcos Freitas once said it but playing against HIM, you realise there are many times where he'll hit a shot at you and it'll come with incredible spin and power at the same time
Women don't get as much spin as men, due to having less strength. Yes, I wrote that correctly with no typo's. The more wrist speed and use you can generate on a ball at one given moment of impact, the more spin you get. Maybe in match play women go end up hitting shots that on average, travel through the air faster. However, I can guarantee you that on average, if Men and Women went into a contest to see how fast they could hit a table tennis ball, men would win no question. Provided there is no consequence for missing or not, the only measure being ball velocity.
Obviously this is a diverse topic. However, after decades coaching, I created a formula for spin
Spin = (Speed that the ball and rubber meets) x (amount of time the rubber and ball spends together)
I talk about these things in way more detail on my FREE skool community for those that want to see me prove it and talk about way more in depth discussions of fixing club level players' problems
https://www.skool.com/pingpong