Having the ability to be quiet and comfortable in a crate is, in my opinion, an important skill for any pup to have - for many reasons:

• As a young pup or a dog new to a household, that pup may not have the skills initially to handle having free reign without having potty accidents, chewing on the wrong items, or getting themselves in trouble - so using a crate to limit that pup's options keeps a pup from making so many mistakes when she is not being monitored closely.
• You never know when your pup may have to be crated in the future - say, at a vet's office for observation or after a medical procedure (such as restricted activity for 1-2 weeks after being neutered/spayed), when visiting a friend's house and needing a break from the activity, or when staying overnight in a hotel (many hotels have policies against a dog being left uncrated in a room when unattended).
• A crate can be a great place for a pup to get the rest and recharging that they need, especially since young pups need about 18-20 hours of sleep a day (and if they are around consistent activity, they may not think to stop and nap - or may get frequently interrupted when they do!).  Using a crate for nap time can be like putting a baby down for a nap in their playpen, and we can more easily ensure that your pup can get quality nap time (which helps keep your pup from having crazy overtired tantrums!)
• A crate can be a safe and secure way to travel in a car, so the pup does not become a distraction to the driver or a projectile in the event of stopping short or going too quickly around a turn.
• If we can make a crate a "safe space" for a pup to be, we can then utilize that space to help a pup acclimate to a new environment or to feel more comfortable when additional stressors (such as company) come into their environment.
• Crating can help build a pup's ability to be independent and still feel secure even when she can't be with you.  If your pup is used to following you everywhere and doesn't get much of her own independent time, we can accidentally create a hyper attachment or separation anxiety issue in the future.

Sometimes it can be easy for us humans to think of the crate as "restrictive" or "being caged", but we must remember that most of a dog's life is about associations - if we make the crate a positive place to be, the dog will not see it as "jail" and will instead see it as a safe haven to relax and decompress, especially since many dogs like to sleep or rest in a den-like environment.