I think most people that point to the historical use of the singular 'they' aren't trying to make any kind of bad faith argument – I think it's more an attempt

I think most people that point to the historical use of the singular 'they' aren't trying to make any kind of bad faith argument – I think it's more an attempt to justify the modern usage by pointing to historical precedent as many folks feel that adds legitimacy. Personally, 'they' singular has sounded natural to me my whole life. How much of that is generational and how much of it is regional variation would be interesting to know.