I think you’re going to get yelled at and I apologize in advance.
It’s a fair question, there’s a lot of reckless claims made these days.
That being said, depending on how bad things get, yeah. Some incredibly populous places will be directly and heavily affected (1.21 billion currently in sub Saharan Africa alone.) Add in the conflicts over diminishing resources (think crop failures, droughts etc) as well as knock on effects (eg, increased range/spread of malaria.)
Heck, climate change has barely gotten started and I’d bet we’re into millions dead already (compared to a non warning world) consider how many thousands have been lost to extreme events like floods, fires and heat waves.
Sure, just like literally everything comparing reality to the counter-factual this involves estimates. Not a particularly profound or useful observation.