How important is it for toddlers to have straight teeth?

Vague: How old is the toddler? 4 or 8 or 13? The toddler (or young adult) should be evaluated by either a pediatric dentist or orthodontist. Straight teeth are only part of the issue... growth can be tweaked to an extent in certain circumstances to align teeth, make room, and prevent major future treatment. Each smile and face is unique, so you'll need to be seen locally for specific advice.

Important: For a toddler its not important , provided there aren't gross skeletal discrepancies, if you have a concern, do see a dentist and get appropriate guidance. Remember the toddler is a genetic sandwich of their parent, and likely will mimic one or the others development

Important because: straight teeth get fewer cavities, less food and bacteria impaction.