That is a fact,but you also have to factor in the competition. Like you can't say Notre Dame of Michigan was the GOAT because they controlled their era when they were playing boys and girls clubs in 1905 lmao.
But its even harder to compare across eras because of all the new training, drugs, techniques, etc. they have today. Like ezzard charles for instance you put him up against artur beterbiev in a time machine, Artur is going to destroy him. But if Ezzard was born in 1997 trained like Artur did, had access to the same PEDs, learned the modern techniques. Ezzard is probably going to literally kill Artur lol.