I get that Rarity did fire Fluttershy but since Fluttershy wasn't really employed to begin with and didn't actually suffer any long term consequences, her firing doesn't really hold any weight.
As you've said so many times.
Ratiry: "SCP"
Fluttershy: "Woke"
I can't even.
Also, Fluttershy offered to help with knitting, but in season 1 we saw that Fluttershy has a surprising knowledge of sewing. She may not know about fashion, but she knews about sewing. Shew knew enough to help finish Rarity's Gala dress.