How many dinosaur fossils have been found in total, compared with the number of dinosaurs that actually existed?
Just for illustrative purposes, if we estimate that 10000 specimens have been found in total (it's probably far fewer), compared with the number of total dinosaurs which ever existed (if for the sake of argument we estimate that maybe on average a million individual dinosaurs were born each year - it's probably many times more than that, but you can alter the numbers however you want if you feel there were fewer or more dinosaurs - the result will still illustrate my point), over the 160 million years in which dinosaurs covered the Earth.
These numbers would result in 160000000000000 dinosaurs ever existing (this seems pretty conservative as an estimate really) which would mean that 1/16000000000 dinosaurs which existed have been found. 0.00000000625% of the dinosaurs which existed have actually fossilised and been discovered if these numbers are anywhere near accurate.
By the same token, if fewer than 16000000000 boats were built by the dinosaurs, we would be lucky to find a single specimen, even if bone and wood had equivalent candidacy for fossilisation (they don't quite, though both can become fossilised). Of course, the dinosaurs would have built far fewer than 16000000000 boats.
If anybody has any disagreement with these figures and processes, provide me with new variables. If you believe that either of the following:
Total number of dinosaur specimens discovered by humanity
Total number of dinosaurs, on average, born every year during the 160 million years in which they existed
ought to be different, please provide your own variables. I assure you that any reasonable estimates will yield the result that a miniscule percentage of the total dinosaurs which have existed have actually been found, and that the same would be true of the boats they built.