I understand that this is a question that easily becomes subjective, so let me phrase it as objective as possible.
I am a person who so far has been traveling within Europe and the middle East, so far without any kind of lock. My luggage typically is clothing and things of lesser value (think gadgets); I carry phones and computers in the carry-on.
I'm staying in the US for a year now and learned about this whole business of having traveling locks such that there even exist TSA approved ones that they can open without damaging the lock (read: locks are apparently a big thing over the ocean).
Is this really a thing that everyone does - or do I just get the biased perception from this side? Should someone with my traveling habits now adjust? Is this perhaps airport or state specific?