Yep it has been incredibly difficult to buy anything of quality from Amazon for the past 2-3 years at least. I will likely cancel my Prime membership this year, it’s just no longer worth it.
It is standard practice by the rust core team to implement as little as possible in the core/stdlib and “bless” 3rd party packages that add otherwise necessary functionality. This allows the language to evolve more quickly.
Cargo, the package management system is very good, and the resulting binary is compiled (therefore you aren’t thrusting 3rd party dependencies on your end users), so there is far less incentive to avoid 3rd party libraries than there might be in Python for example.
Can you parse CLI arguments manually using rust? Of course, but should you?