I don't get this of tutorials

Ok this is what I don't understand what I see all like on YouTube I see only tutorials like I see that people make about the block and items and tools and models and also achievement and also effect and particle effect and music and I also see procedures but there is few things I don't see on tutorials like 

Dimensions

How to do with more animated models

How to do with animated items and tools 

How to grow growing grass not talk about trees no I taking about how to growing Grass block not in plant 

And also how to make a structure in the dimensions to stabilise it

And also how to make a model weapon or tools 

And I don't see on tutorials about guns or bows 

And I also don't see a much about crops growing in different ways like how growing crops on different block 

Once if you don't believe me what I'm saying just look it up on YouTube what I'm talking about I looking at all the tiles and I see only the same things that I mention it a lot but not the things that I did not say about it but I how to make and how to grow and how to make a 3D model for a weapon or tool for even making a gun or even a trying to make a bow or making a crops to grow on say like a nether block or different block once this is something that I noticed that people always making the same thing why not change your little bit that you make something new about it like a new tutorial because some tutorials are repeating it  self you just have to type up on YouTube mcreator tutorials and you get  this as list.

How make a block 

How make a items 

How to make a furnace

How to make  a crafting table 

How to make a structure 

How to make a model 

How to make a model 

How to make a effect 

How to make  a achievement

How to do with procedure

How to make a crops growing 

How to make a tree growing 

How to make a gui 

How to make biomes 

But I don't see things so of the other things if you looking on YouTube and it doesn't matter what language you look at you see all the same so why not learn new things if other people repeat but if you don't understand me fine just look up then maybe understand me then you getting my point