Isn't blender good enough for game development?

I’m going to agree and disagree with this all at the same time :), as an extreme example eclipse or notepad ++ can make games and engines in which N++ is just a tool. But I’m pretty sure we can all agree using UE4 is much quicker than making a game in notepad.

There are some 3D modelling suites that have half tacked tools, sub par .FBX pipelines and issues with common game items like smoothing groups and some apps layouts are extremely convoluted. But I’ll agree that today most 3D modelling apps are just different ways of skinning a cat and it comes down to personal preference.

So in summary, it’s all about time and individuals.