If everything has a purpose then evil doesn't exist

[R-Farmer]

where you get 300? do you have book chapter and verse to support this number?

Maybe you oughta read and familiarize yourself with the story starting in gen 6 before you start trying to represent it.

Got that chapter and verse for the egg collection instead of walking things going on the ark?

nope. It's just a plausible explanation supports by the original hebrew text. meaning if one were so inclined one could interpret the original text to include eggs/baby mammals. as the words originally used do not have a straight modern taxonomical word or phrase that it translates to.

If you look at the raw translation it simply says "Everything living made of flesh take two of, into the ark" this would obviously support the offspring of those animals.