dinosaurs are a group that includes the subgroup of birds. most dinosaurs are extinct, but birds still exist

homo erectus is a single species within the group known as hominins. most hominins are extinct, but homo sapiens still exists

apples are fruits. I like apples, but that doesn't mean I like every kind of fruit

I have watched the simulated running of various dinosaur species in documentaries such as Jurassic Park.

I have also watched my chickens excitedly run around my back yard.

There is nothing you can say that will convince me birds are not literally dinosaurs.

Too bad, now you, me, and everyone is a fish. All the tetrapods were originally descended from fish (technically, the ancestor to the modern kind of fish), meaning we are closer to bony fish than sharks are!

Mammals (including us humans!), reptiles, dinosaurs (and by extension birds), and amphibians are all FISH!

As for birds being dinosaurs, you also have a lot of physical similarities too! The feet of non-avian dinosaurs are similar to those of modern birds with hollow bones, and I think the skulls were similar in shape too. Recently, we have also found evidence of some dinosaurs being feathered. There is also evidence of bird-like behaviours in some dinosaurs, like brooding (e.g. a hen sitting on some eggs) and herding (grouping together)