It's interesting how nobody has commented on how an abolition of anti-discrimination laws could so easily be weaponised in support of identity politics. For example a feminist run store refusing men in the name of creating anti-patriarchal spaces or a business in a predominantly black neighbourhood refusing whites on the basis of cultural insensitivity. Something that would receive far less censure than a Jim Crow style policy. It would very likely blow up in your faces, and you'd spend whole weeks whining about it. 🙁
In addition it's impossible to accurately predict what attitudes will look like in 100 or 200 years in regards to what kind of behaviour consumers will and won't tolerate. Que sera, sera I guess?
However, that aside, nobody should ever have to face discrimination in their lifetimes, which fundamentally unethical and should never be afforded legal protection. And only by enshrining anti-discrimination principles in law can you properly ensure that.