Hmm I wonder if I may have shot past the more straightforward way to parse it.
I'm coming from a stance where "don't do it as soon as you know it's ableist" is voiceless rule, so that significantly colors how I'm interpreting it.
That response was more me being like "oh wow this is essentially saying ignorance is an excuse for using ableist language" (caveats run amok here like "only when there are no known other words" as well as "strictly only when one isn't employing a shitty stereotype when referring to whoever they're referring to")
Admittedly, I can see how that is still a less than desirable takeaway, but all I'm trying to say is I 100% agree with what you've written.
Tldr; thank you for the clarification! Full agree and this is mostly just me trying to figure out where some disconnect is
Funnily enough, a dentist did tell me something like this once, but for soda.
Apparently it's better to chug it than sip it because the acid in the soda doesn't touch your teeth for as long.