But if you need 0.1% tolerance resistors and the circuit diagram requires a 13.3 (±0.1%) kΩ resistor, you can just order one ...?

I have a hard time imagining situations like "We need a very precise 57kΩ (±0.5kΩ or about 1%) resistance but we can only get three precise resistors: 10kΩ, 22kΩ, and 47kΩ! Oh thank god we can connect 10kΩ and 47kΩ, if the last one was 46kΩ we would have been in trouble."