Why would using Arc mean that someone is fighting the borrow checker, or confused by it? Would you also say the same for a C++ project that uses shared_ptrs ev

Why would using Arc mean that someone is fighting the borrow checker, or confused by it? Would you also say the same for a C++ project that uses shared_ptrs everywhere? The clone quip doesn't work super well when comparing to C++ since that language "clones" data implicitly all the time