Recording studios are not audiophile dens.
Engineers are not fools.
Studios do not use simple interconnects with XLRs or RCAs; they use massive bundles with XLRs and multipin connections.
Hogwash. Most had walls of individual cables. Snakes are used on stage for safety, but I never worked a session anywhere with a snake box on the floor. Typically for a large session, cables would run to a wall jack panel which could be wired with multi-conductor or individual cables.
For vocals and overdubs, often we would run a single cable under the doors. Some studios had a few cables in soundproof pass throughs to connect directly from the mic to the preamp.