No, it's no bother at all! From what I have researched the USB on the Nexus 7 is pretty fragile. At least the 2013 model, although I believe the 2012 model is fragile as well. I guess that's what you get for such a low price tablet.
The USB just eventually broke from putting the USB cord in and taking it out. I have the 2013 model that has Qi wireless charging capability, so I just bought cheap Qi charger from Amazon for like $15. It's not a perfect solution but it mostly works. For those with the 2012 model where the USB port broke I've read that people have just bought a dock that can charge through the pogo pins.
I guess just try and be careful with how you use the USB port. I have kids and they probably pulled the cord out too roughly too many times. It started to get loose and flaky before it finally quit on me. Now it is incredibly loose and won't hold a USB inside the port, and won't recognize it when I plug one in either.
I know it is off-topic but I can't resist asking you, how did your device's USB get damaged? I always transfer files on my Nexus 7 (16GB wi-fi) through computer and now I'm quite concerned if anything like this ever happens to my device what would I do? I don't have any other modern device to transfer files to my Nexus 7 via Bluetooth and using cloud storage isn't an option for me as I do not have any wi-fi setup at my place as of yet. Is Nexus 7's USB port fragile? How are you charging your device? Please accept my apologies if I bothered you and I'd be glad if you kindly answer my question.