I agree with you.
Going blind would be awful and while I could handle being partially blind I could not handle full on blindness.
I've tried closing my eyes and getting around and even with help it would be hell to have to live without being able to see.
If I cannot see nature, see my kids, see my computer, TV etc I would rather just not be alive.
Some people still find joy in life while being blind but to me I highly doubt I could find any joy in it.
I went to school with a guy that went blind and he lived for 5 years before he took his life at 30 years old.
He said he was just holding on for his family but could not take being blind anymore and at the time I couldn't understand his thinking but now I can.
However many people do live long lives while being blind but not everyone can.