Re: "WTA players are more unstable emotionally" - Tsonga
It's not very hard : men's tennis is superior to women's tennis because if a male player with a ranking plays any women player, she will win 6 games at best in a best of three match. Men have better technique, more power, more stamina, more speed, and yes, are on average steadier mentally. You might like to watch WTA better, doesn't change this.
You don't know this as a fact, and i doubt we will ever get to find out.