Exactly. Just like with any long term illness physical or mental. The onset is full of questions, and what if’s, and why’s and hows. It’s all unclear and confusing for everyone involved.
You’re loved one is the most confused because nothing makes sense for a while, stuff that was easy just a few months ago seem beyond reach now. Communication, memory, motor skills even can take a hit. With meds and therapy, it can be managed and kicked down.
Good luck and like so many have already said… this is not the end, just a detour.