I like the logic but @Undisciplined brought up a good point on the pod. To go 16-0 you are competing all against playoff teams whereas in the NFL an elite team might play in a weak division (which is 6 games of their schedule) and divisions get matched up against other divisions in scheduling so if their division happens to be matched up with other bad divisions that could account for another 8 games of playing average to bad teams. That’s a huge portion of the regular season schedule. Imagine if the Bills who play in a weak AFC East and were also faced up against the AFC South (bad division) and NFC South (bad division) that year. They could maybe only have a few tough games all year. Then if they are perfect throughout they will get the 1 seed which means a bye in the first round plus home field advantage throughout the playoffs until the Super Bowl.

The only issue is unless there is another elite team that could challenge them for first seed they might be inclined to start resting guy the last couple weeks of the season to make sure they stay healthy. Obviously that is not a factor in NBA playoffs. But NBA teams even if they had home court advantage all the way through would still have to play 8 road games against good teams to go 16-0.

I think the biggest issue with the NBA playoffs is that it's really hard to beat the same team four times in a row. They make adjustments game to game and then they play with more desperation as they face elimination.