Thats not true.
You're making this conclusion with the assumption that I'm not capable of hypothesising or imagining an event unless I've experienced it.
That is to say, you are assuming that I couldn't make an observation about the human mind and it's ability to 'blank out' unless I had experienced it.
They may be, but ultimately, wanting to forget becomes forgetting, if you're good enough at it.
So really, they *can* be the same thing.