Not as simple as you present it, Palestinian would actually have received 73%, possibly extensible to a maximum of 92% (by Israel definition of the West Bank. On top of it, the Palestinian territory would have not been contiguous.
Arafat didn't not trust the Israeli for the extension and thought he was being scammed. He may have been right, in particular when considering that the Israeli RW was against it.
"Based on the Israeli definition of the West Bank, Barak offered to form a Palestinian state initially on 73% of the West Bank (that is, 27% less than the Green Line borders) and 100% of the Gaza Strip. In 10–25 years, the Palestinian state would expand to a maximum of 92% of the West Bank (91 percent of the West Bank and 1 percent from a land swap).[14][16] From the Palestinian perspective this equated to an offer of a Palestinian state on a maximum of 86% of the West Bank.[14]"
https://en.m.wikipedia.org/wiki/2000_Camp_David_Summit