What is A:M?
A:M is a complete pipeline for 3D animation. You model, rig, texture*, animate, light, and render all in A:M. You never need to detour to another program to get part of that pipeline done. Because of that, accommodating models from other programs is not a priority for A:M.
I put an * by "texture" because most people like to use bit map images painted in a program like Photoshop for textures and import those into A:M, but A:M has good non-bitmap texturing powers built in too. There's also a separate 3DPaint program for A:M if you want to paint on the model.
here's a thread where one of our forum members was making "Ironman". It's not an "anime" character, but it's similar in construction to the image you showed.
Notice that the commenters in the thread are very impressed. A new user will not be making models like that immediately.
3D is a demanding art. There are many skills you need to become proficient at. Model, rig, texture, animate, light, and render. Each one of those is a field of study.
A:M is great because a beginner can get something going reasonably soon and yet it doesn't limit accomplished users to basics.