The key here is, most people in our society assume that "scientists" are all smart. At least above-average smart, if not genius level smart.
And by and large, scientists don't complain about that perception, because why would they?
But here's the thing: Science is just like like any other job. No one disputes that there are bad plumbers, bad mechanics, bad waiters, bad bartenders, bad bureaucrats, bad accountants, bad lawyers, you name it. And just as with every other job, there are just some bad scientists out there. People clever enough to remember what they need to pass a test, clever enough to follow the instructions in their lab book to get the expected result, but not quite clever enough to quite grasp the essence of science, what it means to
expand on knowledge, rather than just
replicate previous work.