26th century - the battle of Procyon 5.
Daniels tells Archer directly that the 26th century federation consists of "dozens of species". The statement puts certain limits on the number of member species in the federation - a few hundreds, at most.
Well - the federation contains a few 'dozens of species' (hundreds of species) by the 24th century, as well.
Sounds as if a long period of isolationism - or, at least, limited to non-existent inclusion into the federation of new members - is coming for the federation.
Considering that the, BY FAR, largest, most radical changes for the federation resulting from recent exploration were the dominion war and the borg invasion (both of these antagonists, relatively newly discovered)...well, the loss/gain results of exploration don't look good at all.
, it's not exactly enlightened to put the equal sign between stupidity/irrationality and opinions you don't agree to (mostly, due to feel-good sayings).