Some folks can. Plenty of so-called scientists start with a premise, such as those who promote global warming. And we get a load of nonsense as a result. Good science (and good journalism and good politics and good cooking, for that matter) starts with facts and then crafts a premise.
I agree it is better to work by deduction where objectivity is concerned, but induction is inescapable. It has a hand in every scientific discipline whether we like it or not. One cannot divest himself of all matters attendant to prior experience, current perception, and the like, especially when placed into a universe at least a thousand times older than oneself.