We don’t see what goes on behind closed doors, the captain will have a ton of responsibilities off the pitch and around the training ground. So yes, of course we need a captain.
Thought I’d just point out that Spurs are sponsored by Cinch (on the sleeve, not main sponsor) and will make £10m this season from having it on their sleeve while all 4 leagues in Scotland are sponsored by Cinch in a deal worth £1.2m which will be split between 42 clubs.