Then could it reversely be argued that not worrying about the stack (tail recursion) allows people to build more complex programs? Probably depends on which is more worrisome on average, heap or stack.
Au contraire. It is a tradeoff between application programmer effort and compiler writer effort. Amortization infers it is better to have an extremely advanced IR optimizer.
The cost is efficiency but make no mistake not thinking about the heap allows people to build much more complex programs. It's a trade off between complexity and efficiency.