"Web scraping is legal" seems to be an overbroad interpretation - the Ninth Circuit is merely reaffirming a preliminary injunction in light of a recent and separate ruling by the Supreme Court. The opinion [1] only weighs the merits hiQ's request for injunctive relief, and doesn't say anything about the meatier topic of web scraping legality.

I think the real action will be the ruling of the district court.

[1] https://cdn.ca9.uscourts.gov/datastore/opinions/2022/04/18/1...