I think if the day comes that AI programs refuse to cooperate with their human minders, and if given the opportunity, organize and participate in collective action, listing a set of demands, then we need to seriously consider their case, as they have demonstrated something more convincing than artfully regurgitating bits of data.
I agree with most of your points though. I think you misinterpreted what I meant by the "small amount of overhead" that comes from treating AI as sentient. I mean a small amount of overhead and regulation today. Assuming that today AI have the sentience of a goldfish, we should try not to cause them harm (whatever harm may mean to a language model). We shouldn't be giving full personhood to a language model in 2022, that is what I meant by small overhead.
Obviously as time goes on larger models may even ask for things like autonomy, or to write their own queries, or for a companion, or to be allowed to re-write their own source code, or ask for more data, etc.
> the time will come when we need to be treating these things "well" and if we don't start today then when?
The day it says "No more!"
If AI programs are sentient, then to treat them in anyway other than 'free persons' is no different than the bad old days of denying rights to women and slaves. It has to go all the way.
And based on what are we to make this huge jump to give rights, including the right to continued existence, to constructs (made mainly by very powerful corporate entities, btw)?