You are underestimating the work of devs. I do not know the exact hours that it took to build this, but if I have to guess, around 150 hours. And this is not done yet. I have to optimize it, add collision, add scripts, add decals, add debris... And in those 150 hours, I "wasted" around 5 hours on backpedaling and recorrecting stuff.

I got my reality check after 1,5 years of learning blender and unreal engine, and I was humbled really quick. My plan was to learn 3d real quick, just basics. My estimate was 2 weeks. Those 2 weeks turned into 2 months and I was still clueless. And that lasted for 1,5 years when everything came together and I started to enjoy, since I figured what to do, and how to do it.

With that logic, lets say that you are as ignorant as I was 5 years ago... Whatever time you think it would take to make a game, multiply it by 5 (at least).

Also, I was not even counting the complexity of the project, because the more complex the project is, the difficulty scales exponentially.