I should hope not, as that's not true. It is, however, fairly accurate to say that you have no reason not to if you can take a short rest. Much as characters in 5e have no reason not to spend hit dice (assuming they have no other source of healing) when they take a short rest. Like. You could choose not to. But there's literally zero benefit to doing so, and very major risk of death for not doing so. Unless the character is suicidal, there is no reason not to.
4e did actually add mechanics later where you might consider not spending surges to heal up to near-max because you might need the surge for something else, but that would be pretty niche.