The pressure on the Governor will not lessen with time, it will increase. Waiting until Sept. 1 may be reasonable, given what's happening both in Hawaii and on the mainland, and the difficult caused by necessary lead times. Aug. 1 is right around the corner. It's clear that it will not even be possible to get the required testing done quickly enough given all the people needing tests right now. So he needs to wait until things settle down, both from a safety stand point and just pragmatically. A 72-hour window means nothing if nobody gets tests results that fast. Even if he said it would be open on Saturday to anyone with a negative test within 72 hours of departure, almost nobody would be able to go!
Hawaii does need to ensure that its residents are complying well and that they have community spread stomped down. And they need to know that people will be ABLE to get a test result fast enough. At the same time, those hotels and restaurants and golf courses and tour companies can't remain shut down indefinitely. It costs just as much to keep a golf course operating for 20 players as it does for 200. But the later is profitable and the former leads to bankruptcy.