Fully agree with your second paragraph but your first paragraph is nonsense.
We have evidence that Delta has a much larger viral load and that it has outcompeted the Alpha variant everywhere in the world. You have to be in total denial to pretend the Delta variant might have been no more transmissible than Alpha.
Delta will spread faster. We know this from seeing it spread in countries that have low vaccination rates and easily outcompete other variants. This can also be seen in laboratory experiments.
We have evidence that Delta has a much larger viral load and that it has outcompeted the Alpha variant everywhere in the world. You have to be in total denial to pretend the Delta variant might have been no more transmissible than Alpha.