people mean the supply of new coins to the market
First, there is no difference between "new" coins and "old" coins. When people write about "new" coins and they call it
supply, they really mean
production. Those are two fundamentally different concepts. There is no such thing as "production and demand"
This is what I call empty verbiage
Even if there is no difference between new and old coins, this doesn't in the least mean that the amount of coins that miners produce doesn't diminish after the halving (which is the point). You are not just nitpicking, you are also making irrelevant claims here. More specifically, in this case it doesn't matter whether new coins are indistinguishable from the old ones or not. And while we are at it, there is still a difference between "new" coins and "old" coins. New ones are mined after a certain date which has a special meaning (the day when the mining reward is halved). So you are factually wrong even in that