Textually, that can be read as a fancied-up version of "all lives matter". Semantically at the time, it most certainly did not have an everyday lived reality that all people were equal.
At the time, women couldn't vote, Black people could be owned, and all people could be indentured servants, which significantly undermines the "Thomas Jefferson said 'All Lives Matter' almost 250 years ago" argument.
If OP’s point was that Thomas Jefferson said something close to “All Lives Matter” 250 years ago in the Declaration of Independence, therefore it’s not a reaction to “Black Lives Matter” today, it seems most reasonable to examine the contemporaneous context of the original words.
At the time, women couldn't vote, Black people could be owned, and all people could be indentured servants, which significantly undermines the "Thomas Jefferson said 'All Lives Matter' almost 250 years ago" argument.