C++ usage has nothing to do with static/dynamic linking. One is a language and the other is a way of using libraries. Dynamic linking gives you small binaries with a lot of cross-compatibility, and static linking gives you big binaries with known function. Most production C++ out there follows the same pattern as Rust and Go and uses static linking (where do you think Rust and Go got that pattern from?). Python is a weird language that has tons of dynamic linking while also having a big package manager, which is why pip is hell to use and PyTorch is infamously hard to install.

Dynamic linking shifts responsibility for the linked libraries over to the user and their OS, and if it's an Arch user using AUR they are likely very interested in assuming that risk for themselves. 99.9% of Linux users are using Debian or Ubuntu with apt for all these libs, and those maintainers do pay a lot of attention to libraries.