Are the UI's actually you?

I thought the whole uploading urself and it's actually you, didn't make sense since they are scanning your brain and making an exact copy of it, as a computer program. It’s like stepping into a teleporter that scans and disintegrates you, only to reconstruct an exact replica elsewhere. That replica would have all your memories, feelings, and even believe it's you — but your original self is gone. So it was weird seeing people willingly submit to the upload process, believing they’re achieving digital immortality. But in truth, the original, biological them still dies.