Exactly this! I’ve studied game design, went the artist direction and we used Unity for our bachelor project, that was 8 years ago. Unreal was not available for free back then and I still regret not having used/learned UDK in the first place! It’s just so much superior in so many ways. Of course can use the engine he likes but for me, Unreal is the way to go after having played with Unity for over 6 years now. You truly see the years and years of experience Epic has.
Letting the artists have access to the game-logic via Blueprints was THE next step on improving the Engine, there are far more artists than programmers out there and if you have a big team of contributors to a project it’s just super efficient. And I also see no problem to implement functionality in C++ later on if needed. All those little extra editors/tools in Unreal (Persona, Cascade, Sequencer, Material Editor) are huge programs in itself you have to learn first to master them. Last but not least the visual representation of UE4 Editor is so much better. I had to use Unity 5.3 at work recently and wow, was I bored by the gray UI. And of course Unreal is now for free, another huge bonus. So for me, Unity is the toy, who would seriously use Unity for games when he has Unreal ? 
Oh and the people from Epic are the only human beings on this f**ed up planet who could make me learn C++ 2 years ago - as an artist. Just because I wanted to know what it’s all about and be able to make my own mutliplayer experience. Thanks for that btw! 