Opinions on gear drive in BB

Are you looking to run it on a drag only car? I have never run gear driven as every time I've mentioned it to the parts guys or car guys they say it's a drag only set-up as they wear out and grind down leaving metal shavings in the oil. Which of course takes its toll on the engine. Like I said I have never run one and going by what I've heard and been told. So I guess I'm asking if that info is correct.