For Apple, definitely. Jobs' opposition to Flash was rooted in the business case for the App Store and the technical limitations of the first couple of iPhones.
I remember when the first 7" Galaxy Tab came out in late 2010. Jobs mocked its size, saying you'd need to file down your finger to use it, while at the same time working on the iPad Mini, which wouldn't launch until after his death.
The triumphalist note in many of these posts makes me sad. Flash had a ton of warts, yeah I get that. But there is a failure to acknowledge the collateral damage done to Actionscript that I find troubling. Itemrenderers, the ability to inline functions in MXML components and a decent OO framework gave me a powerful platform for rapidly iterating UI designs. The tools I currently use just don't measure up (I'm looking at you, C#) and it's left a bitter taste in my mouth.
Steve was right very briefly but in hindsight it's pretty irrational to expect a piece of software to not run on a powerful CPU without contrived restrictions like being "banned". We'd have the full Adobe Flash IDE on the iPad next year if Jobs had no grudge and we just waited for the software and hardware to improve. Photoshop's halfway there and SQL Server made it to Linux and Windows made it to ARM.
Flash did not run properly on powerful desktop Macs back in the day, how could he expect that Adobe would sort it out for the iPhone?
The solution was to wait for the software to get better, the hardware to get better, the batteries to get better - today the Flash IDE could run on Windows tablets not much bigger than the iPad Mini, authoring content where before it couldn't even play it back.
Why should Apple wait for some other company when they were perfectly capable of shipping something way better? Adobe had the opportunity, and they missed.
I think a better question is why should Apple persecute anybody's software? Especially just because it's not yet performing well on a new, power-sipping processor and architecture. It will be years before anything complex runs well on their watches, that's a stupid reason to sabotage anyone's efforts.
Adobe could have made a great player for the Mac, but they deliberately chose not to. It was awful, power hungry and laggy on Apple desktops and Macbooks. Adobe didn't care about the Mac ecosystem, the player was/is closed source and Apple couldn't not do anything. Why on Earth should Apple invest on a tech that is proven to not work reliably on their platform. Adobe blew it, Apple just made the right decision.