why people always talk about those "data structures" and in reality they have basics in mind? Seriously when you've been writting any software for e.g >1 >2 y

why people always talk about those "data structures" and in reality they have basics in mind? Seriously when you've been writting any software for e.g >1 >2 years then I'm pretty sure you must've been using almost all of them who cares about details of complexity when very often just pick of the correct one (that suits the problem) gives massive boost. Ofc you may need sometimes something trickier, but hey - there's time to find it.