Agreed, besides, she wasn't even intended to be the Element of Generosity in the first place. She was created to be the "Element of Inspiration," basically meaning she was very inspired and passionate which I think sounds a LOT like Rarity but sadly, silly old Hasbro nixed that because "It'd be too hard for the kids to wrap their heads around." Seriously?! Also, when you think about it, it's a SLIGHTLY but GOOD thing she isn't ALWAYS her element
The other Mane Six members are just something or just have it. Rarity works toward her element with effort even though she makes mistakes, but EVERYONE has flaws, right? Flaws suck but they're believable. She's more believable than Fluttershy really who's always kind and stuff unless you include "The Best Night Ever" episode. (Sorry Fluttershy fans, I still think she's good of a character sometimes) Rarity gets scrutinized because the series has SO MUCH ideas how she COULDN'T be generous. If Rarity HAD to ALWAYS be generous, she'd be a bigger doormat than Fluttershy with everyone else for their own happy benefits. So NO ONE can always be generous, right? Generousity is unexpected as said here. Her element is being to higher level than the other elements. Since how much Loyal can Rainbow Dash even be? Pretty much Rainbow Dash is my least favorite of the Mane Six but still. Sorry for going bit into a rant myself.
Why Rarity -supposedly- isn't true to her element
in Clover Heart's Blog
A blog by Clover Heart in General
Posted
Agreed, besides, she wasn't even intended to be the Element of Generosity in the first place. She was created to be the "Element of Inspiration," basically meaning she was very inspired and passionate which I think sounds a LOT like Rarity but sadly, silly old Hasbro nixed that because "It'd be too hard for the kids to wrap their heads around."
Seriously?! Also, when you think about it, it's a SLIGHTLY but GOOD thing she isn't ALWAYS her element 
The other Mane Six members are just something or just have it. Rarity works toward her element with effort even though she makes mistakes, but EVERYONE has flaws, right? Flaws suck but they're believable. She's more believable than Fluttershy really who's always kind and stuff unless you include "The Best Night Ever" episode. (Sorry Fluttershy fans, I still think she's good of a character sometimes) Rarity gets scrutinized because the series has SO MUCH ideas how she COULDN'T be generous. If Rarity HAD to ALWAYS be generous, she'd be a bigger doormat than Fluttershy with everyone else for their own happy benefits. So NO ONE can always be generous, right? Generousity is unexpected as said here. Her element is being to higher level than the other elements. Since how much Loyal can Rainbow Dash even be? Pretty much Rainbow Dash is my least favorite of the Mane Six but still. Sorry for going bit into a rant myself.