0.5% for transactions below $ 10,000 is a high fee when compared to other exchanges. Coinbase pro is a good exchange but it is not suitable for traders who trade with high frequency.
Your quote is literally self contradictory.
The whole idea of coinbase pro is probably to encourage professional traders to trade with high volume, and based on that they'll get discounts on trading fees. But I think that their execution is way off, because discouraging small time traders to trade on their platform altogether is NOT the way to go.
You want all traders, big or small, especially when you consider the f act that big traders will likely want to try out your platform at first with a small chunk of change as opposed to using your platform full time. What kind of image would it create if they see a 0.5% fee? Besides, the fee structure doesn't even get that much better compared to their competitors for even high 5-digit and low 6-digit trading volumes. It's only for the 0.1% elite that it's even worthwhile to use coinbase pro.