Make a statement that the aim of USDe is to piggy back the US dollar and ultimately 1 USDe will equal 1 USD,
This part of the statement is not adequate. Because, we can aim more then 1 Dollar but not less.
So saying 1 USDe >= 1 USD is a better statement. Because we dont want to lower USDe value if it is higher than 1 Dollar

Yes, but if somehow you can tie it to the US Dollar if USDe ever becomes more valuable than the US Dollar people will then sell it.
What is the point of having a USDe worth $2 if you can only buy something worth $1 with it.