If Sikhs get an exemption to carry a knife, then men transitioning to women should get an exemption to enter female-only spaces and sports.
If Sikhs get an exemption to carry a knife, then Muslims should get an exemption to practice polygamy.
If Sikhs get an exemption to carry a knife, then Jews should get an exemption to run schools that provide almost no secular education where kids would only be taught about Judaism.
If Sikhs get an exemption to carry a knife, then Christians should get an exemption to refuse medical care for their sick children on faith-healing grounds.
If Sikhs get an exemption to carry a knife, then some atheists should get an exemption to use psychedelics based on their sincerely held philosophical beliefs.
At that point, thereโs no point having laws that supposedly apply to all of us. Weโd just let every community pick whatever thing they want exempted.