It certainly can be a chock for many to realize that your own culture and experience is not the norm for everybody. And once you learn to not always think right or wrong but accept other cultures as different instead of wrong you will have lost a part of the culture that was yours before. Most do not realize this until they return to what used to be normal and find that it now also seems different to you. A world traveler that really learns and experiences a new culture will gain much, but it comes at a price, home will not feel the same afterwards.
There is a poem presented in many different languages in the international terminal at Arlanda airport in Sweden that sums this up very well:
all countries are my home.
I am a stranger everywhere."
Totally agree with you, it won't feel the same anymore. I have changed, and the rest is still the same at home. I feel more alone than ever. That is the price to pay, freedom is not free.