cat toys

now can someone please explain some pet toy logistics to me
because i have serious questions that need answering

first
why are cat toys all flimsy little things when theyre tigers that live in my house and eyeball my birds like theyre dinner even though the fat little dudes already ate way too much today?

second
why are dog toys all sturdy like when my dog is a wee little wimpy guy that cant even break down one of those chewy stick things for his teeth all that well?

this is all more questions to follow as they become more pressing than cat toy conundrums