Yes that's pretty much spot on. Making espresso with a manual lever machine isn't too hard too mess up, especially not in comparison with pressing one button or filter coffee. Yet it's apparently not that trivial to make such a machine, and keeping it working for hundreds of cups a day: prices of those are easily well over 10k$.

Sure but espresso varies, change the bean even the age of the bean and the recipe needs to adjust. Not to mention not everyone wants the same experience every single time, and not every person wants the same exact espresso that the last person had.