> Programs, which allocate large amounts of memory without strict necessity to do so, are just a consequence of swap existence. "Thanks" to swap they weren't properly tested in low-memory conditions and thus no necessary optimization were done.

Who told you this? It's not remotely true.

Here's an article about this subject that you might want to read:

https://chrisdown.name/2018/01/02/in-defence-of-swap.html