Biggio was a good 2B, but he seems as much to me to be a guy about longevity than greatness. He played for 20 seasons, which is a long time. He had just 7 All Star appearances, 4 Gold Gloves, just a .281 career hitter (only over .300 three times), under 300 home runs, never close to a MVP (4th once, 5th once, no other even top 10 finishes), etc. He played a long time and was relatively healthy, but he just never struck me as a HOFer.
Contrast him with a guy like Ichiro, who has played 13 seasons and doesn't have 3000 hits, but who was an all star 10 of those 13 seasons, was a MVP, won batting titles with a career .319 average. Now I get that 2B is thought of differently than OF, and I suspect Ichiro gets in without issue when he is eligible, but they are similar players in many respects and Ichiro is significantly better on a season by season basis.
Playing a long time is great, but it doesn't make you a HOFer, greatness makes you a HOFer, and I just don't see Biggio as a HOFer. And frankly the only reason he came close he is that he is thought of as a clean player in a dirty era, which is just silly. No way Biggio gets in based on merit. At least that is how I see it.