Nine of those became president through the death of the previous president and I'm assuming you don't want Cruz to gain the White House that way. Only two sitting vice presidents have been elected president in the last 200 years - George H. W. Bush and Martin Van Buren. It most certainly is not a path to the presidency.
“I’m assuming you don’t want Cruz to gain the White House that way.”
I may not want it. That does not mean it won’t happen.