Maybe the OPer has good cause to make such a statement.
1) Ever heard a woman say that size doesn't matter and then as proof she offers up that she would rather be with an average one that knows how to use it than be with a big one that doesn't. It might not be those exact words. It can be some version of it, such as saying good looks plus average dick is better than not good looking plus big dick.
Women who say size doesn't matter and then give such examples for some reason think they are giving proof that size doesn't matter to them. When I read or hear such sentences I see/hear a lie, or perhaps it's often just plain ole in denial in some cases. If they 100% thought bigger isn't better then they would not give uneven examples that give the smaller guy some sort of advantage.
Not only are the examples not balanced, notice they never ever dare throw the bigger guy the advantage. An example such as her saying she would rather be with 'average and doesn't know how to use it' than 'big and knows how to use it'. That is never offered up as proof. Never. What is always the case in such examples is the woman gives the smaller dick guy some sort of advantage to go along with his size. Why did she do that. If his penis size is truly equal in her eyes then she would not feel compelled to throw him some sort of advantage to go along with his size.
In case that somehow isn't perfectly clear. What if when a guy is asked if bigger breasts are better to him, and he were to say "Bigger breasts are not better to me. I would rather be with a woman that has average breasts and a great personality than a woman who has large breasts and a terrible personalty".
Would not that smell like less than a totally honest answer. Why did he add the personality part, and why was the advantage of a better personality given to the woman with the smaller breasts.
2)Another one that is used by women claiming size doesn't matter:
"I've found that guys with big ones tend to not use it well. They assume insertion is all that is needed".
Fair enough if that has been her experience, but notice that once again something doesn't add up.
Whereas above I pointed out the additional positive factor typically given to the smaller guy even though she is saying everything is equal, in this case something is being left out, never ever gets even a mention by the 'big guys don't use it well' 'size doesn't matter' group.
What is being left out? It's her riding on top that is conveniently left out of her statement. When she is on top that becomes a non factor. It's a much used well known sex position, one she has probably used many times. Suddenly it doesn't exist though. Oh the forgetfulness! That non mention indicates to me the woman may very well see herself as a defender of the smaller guys, as once again just a bit of examination indicates a real chance she isn't being 100% honest.
3)Here's another common statement made by women claiming 'size doesn't matter':
"Sure, a big penis is especially nice to look at, but size doesn't matter to me."
If size has a visual psychological advantage then it DOES count in the bedroom towards turning her on. It does matter to her, at least in the form of foreplay. It doesn't matter whether she prefers a big dick physically or not, it counts for foreplay and therefore matters.