People tried to "just do that" (write their programs in a memory safe way) in C and other languages with manual memory management for decades, and we have countless vulnerabilities that prove this simply doesn't work. That's why newer languages, with the notable exception of Zig, prefer more advanced memory management methods.

That's like saying that they should have used assembler but they just weren't capable of it. It's personal insult dressed up as a nonsensical technical argument.

It matters what software you're writing. When it's a JavaScript runtime, it's not as if you can get away with preallocating all the memory you'll need like some games used to do.

So it's reducible to a simple matter of inferiority vs superiority?

Is engineering capability the issue, or time pressure/constraint?