How much you need it is inversely proportional to the likelihood you'll get it.
In other words ... if you've got a radar controller with nothing else to do who would love to give you a TS just in order to have someone to chat to just to relieve the boredom, it'll be on a day when you're the only person at 6,000' for 50 miles in every direction and there's no real need to be talking to him at all!