We are exploring them, tacticalogic. Just not so uncritically as you'd prefer. Are scientists not human, subject to the same vagaries of pride and predjudice, as the rest of humanity? I see it writ large, in a self-serving, centuries long effort to contravene anything remotely supportive of Biblical history. You see it as an unbiased process, in search of "truth where ever it leads." It's certainly led a wide swath away from certain potential truths, though. That's bias.
Bias on which side?