Why are there no 4K video editing apps on Android in 2015?

Here is the deal: 4K video has been around on Android smartphones for quite a while. The first mass market phone to have it was the Samsung Galaxy Note 3 released way back in late 2013, that's nearly two years ago. Since then, 4K recording has become pretty much a standard feature for top-tier Android phones these days: the Samsung Galaxy S6 and Note5 have it, the LG G4 has it, the HTC One M9 has it, even the more affordable new Nexus 5X and 6P support the feature.
Yet there are no video editing apps available either natively or on Android's Google Play store that would allow you to edit those short, 5-minute 4K clips that you are allowed to capture. None.
There are no 4K video editors on Android
We're flabbergasted. After all, what are you supposed to do with the video that you've captured? We rarely have a video in our library that does not require a slight trim, some added text or a little extra flare before being ready to take on the wilderness that are YouTube and Facebook.For starters, though, we don't really want fancy: we want a way to simply trim and queue videos. On Android. Now. It's the end of 2015, after all. Is it that Android developers are so lazy? Or should Google take things in its own hands? It's hard to say what the reasons are and what the ideal solution is, but right now this remains a sore issue for the ecosystem that first brought 4K video recording on phones.