I was gonna say "Well, maybe not when that one RX 570 4GB model was available for $99.99" but then again, the Sapphire Pulse has a better cooler than most.The cost has to be cheap. RX550 and RX560 really made sense in the mining craze since they were cheap, but now they cost about as much as an RX570.
If Asus makes this card around $70 new to slightly undercut with a GT1030, sure it may have a purpose as an upgrade for OEM pcs.
Regardless of price, a used RX570 will always be a better value than any other RX card. I got a 4gb Sapphire Pulse RX570 for $80 for example.