How would we plebs know? We wouldn't until recession comes and demand goes down, and if I'm wrong then I'm wrong. But wait until the end of 2023. 
I "know" (and yeah I don't, I agree we have to wait) in the sense that overadjustment would have shown itself already, that's not something that gradually happens, if it's gradually going down, then we could stop that too and make it stay right where it suppose to. Did inflation go up slowly? No, when it happened it was suddenly a ton of issues right as soon as they printed it, and that means deflation would be similar as well in that sense. I don't know what you mean when you post about "2019", BUT we have seen a massive overadjustment by Central Banks during 2020 when the COVID-19 Pandemic/Lockdowns happened all around the world. The Central Banks pumped so much money into the system which caused high inflation. They said it was transitory, but we knew it wasn't.
The idea about 2019 was that, 2023 will be similar to 2019 in the economical sense, do you agree that 2020 and 2021 and 2022 was a bad year? Do you agree that 2019 was better than all those years and yet not so great like we were buying houses like we bought candy? Well, that's where we will go back to. Better than 2020-2022 period but not too great.