Except it was Adobe who decided to deprecate Flash on mobile devices, and - demand or not - the product BELONGS to Adobe. It is closed-source, proprietary technology that THEY own. If Adobe says no more Flash on mobile devices, then that's how it's gonna be. Anybody who takes that technology and uses it against their wishes is violating intellectual property law, and becomes subject to criminal action.
Whether or not it's what Apple wants doesn't have much to do with it as long as it's what Adobe wants, which appears to be the case.
Companies wanting to keep the business of mobile users will need to begin developing mobile and/or HTML 5 versions of their sites. The further we get away from Flash on mobile devices, the closer we'll get to a unified browsing experience across all platforms.
Edit: The only way *I* see this changing is if consumers raise enough demand for Adobe themselves to continue development, if consumers convince Adobe they're willing to PAY for continued development, or if some corporate entity offers to BUY the rights to independently develop it. Flash is PROPERTY. It belongs to Adobe, and no sense of entitlement, no matter how strong or righteous, overrides that.