The data shows that tackles that are thought to be worth a top 10 pick tend to end up having been worth drafting. This season, unlike a lot of recent seasons, there may be more than one of those players, even if a couple of them will need developing to achieve that level. Furthermore, New England doesn't typically get a chance to draft this high. These are reasons which strengthen the argument behind drafting a LT, not reasons that weaken it. Even using the 1998 cutoff year as you do, this shows itself to be pretty apparent:
Chris Samuels
Mike Williams - He's a bust.
Bryant McKinnie
Levi Jones
Jordan Gross - He's been lousy at LT, the position he was drafted for.
Robert Gallery - He's been a bust as well.
D'Brickashaw Ferguson - Things don't look great for D'Brick.
Joe Thomas - Too early to tell, but looks promising.
Levi Brown - Too early to tell, but looks promising.
That's the entire list of top 10 tackles from the 1998 draft through the 2007 draft. Williams was a bust and Gallery has been moved to guard. The rest of them have either not been in the league long enough to be labeled or have proven not to be busts. So, 9 picks, one certified bust, and at least 3 excellent players (Samuels, McKinnie, Thomas). If the top 10 tackle is available and worth a top 10 pick in Belioli's eyes, that top 10 tackle should be the pick.