Those are some weak arguments PSac.
The wording of the Genesis account CLEARLY indicates that all humans and animals and the entire world was destroyed by the flood.
Jesus talks about how "everybody" and "all" the people were swept away in a flood. And he is referring to an account in which the WHOLE WORLD was flooded.
It is very clear what he is speaking about and referring to by these statements.
What you are suggesting is that the Genesis account is inaccurate (although inspired?), that Jesus came and invoked this inaccurate account to describe a future event giving most people a misimpression, but while technically not saying something to contradict the actual true version of the Genesis account (a local flood) that only he and heavenly entities know about (and which a few geologists would eventually figure out 2000 years later).
Seriously, who is putting words in someone's mouth here???