Interesting thought, mysterio....but consider this:
Insects are very small, even compared to small mammals, let alone people or dinosaurs. The mass of every human on the planet works out to about 971,813,840,000 pounds, and the biomass of insect life on earth is about 12 times that of human life. In other words, there is a total insect mass of 6X10 9 tons on the planet. Megafauna, and dinosaurs in particular, require large habitats and sustainable populations are comparatively small compared to that of humans, and miniscule compared to that of insects. Since there is 49 million square miles of habitable land on the planet, there would be about 122 tons of insects every square mile. A massive brontosaurus weighed about 40 tons. So today, right now, there's an insect biomass equivalent of 3 brontosauruses living in every square mile in the habitable world, roughly speaking. A dinosaur's equivalent of insects are probably living in just your own immediate neighborhood. And that's a density that could never exist in such large megafauna as large dinosaurs throughout the total area. So largest individual size does not necessarily imply greatest comparative biomass for the species.