Is there such thing as a “too controlled” environment

Hear me out, I have a 14 weeks old puppy.. for the last 1-2 weeks I’ve decided to keep her predominantly in her pen. Before I had the kitchen area closed off with the pen in the kitchen for her to go in when she needs water or we use it as a “reset” area if she is a bit to rowdy. If I can’t directly supervise she’ll go in also.

But recently I decided I wanted to have her hang out other areas so I can do work or other things around the house and using the pen is easiest. I am starting tethering training today and eventually once I start leash training (working with a trainer, will start leash training in a few days), I want to use a house line to give her more controlled freedom. I don’t anticipate we can get to that point until maybe a few more weeks to get her use to having a leash attached.

So back to my question- I was worried that she won’t know how to handle herself if I am a bit too restrictive. I think I’m overthinking this but reassurance or advice always helps. Today, I wanted to start taking her to different parts of the house to do some training (to help generalize). The bathroom is large and small enough for this, I have nearly nothing on the ground for distractions. She started chewing the walls which is normal she is teething, so I just redirect. But I suddenly had a thought of- what if she never learns to not chew something or how to coexist with various objects and furniture..

This is def my fear talking I know I won’t confine her to the pen forever, it’s a process. But I keep hearing about some people letting their puppy have more access at this age and they’ve been doing fine.. but I can’t imagine how that’ll work for my puppy.