The 4 Kurehits are quite clear: no meat, no relations with anyone other than your spouse, no meat and no removing kesh. These are not "man made artificial rules,". An amrithdari women that removes facial hair has commited a Bujjar Kurehit. It can't be justified because all other women in the world do the same thing.
Rehit does not change because we live in a modern world, it stays the same. Its not about femininity, the same rules apply to man and woman. It is not acceptable for a man to remove facial hair, similarly its not acceptable for women to remove hair, whether it is on their face or on their arms etc.
If you argue otherwise you are going against Gurmat.