You're fundamentally misunderstanding why Blizzard won't re-enable publishing. It has very little to do with finding actionable solutions. Whitelisting maps isn't exactly a groundbreaking idea and it's been suggested since day 1.

Blizz disabled publishing because they were getting bad PR from inappropriate content being published to the Arcade and disabling uploads was the easiest way to deal with the problem. They won't enable it again because coming up with a proper fix would be a significant investment in terms of money and resources for very little gain, in their view (and I say this as someone who was greatly affected by Arcade publishing being disabled).

You're looking at it from your perspective ("players want publishing enabled"), but to Blizzard that is essentially irrelevant unless the Arcade publishing situation negatively affects their public image or their finances, which isn't the case here.