Isn't it normal for mortgage payments to be at least to some degree higher than rent if talking averages? Bought property tends to be much larger right? I tried

Isn't it normal for mortgage payments to be at least to some degree higher than rent if talking averages? Bought property tends to be much larger right? I tried to find normalizing factors like it talking about payment per square foot but didn't seem to find any. I assume WSJ wouldn't push out anything completely off so what am I missing? The difference has grown just much more than it should have?