It's frustrating how no other launchers have even a fraction is the useful features Steam has. How come I can't buy games as gifts for my friends on other store

It's frustrating how no other launchers have even a fraction is the useful features Steam has. How come I can't buy games as gifts for my friends on other stores??? It's free money and network effects and a very easy implementation. Steam is winning because nobody is even trying. The only other good one is itch.io, but you won't find AAA games on it of course.