Why do some people think it is so easy to get over traumatizing stuff from the past?

I swear that some people can be so insensitive. It’s like some people think that everyone had it easy and they are just complaining. Why are some people like that? It seriously upsets me when someone says stuff like that. They don’t know what I’ve been through.
Why do some people think it is so easy to get over traumatizing stuff from the past?
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