How so, if you do not mind me asking. Considering how young he is the risk is negligible, barring a career ending injury.
Because it wouldn't put the team in a position to have to plead with him to take a pay cut because his cap charge is too high at a point when he's no longer a young player. That's exactly why Ware isn't on the team.
When is he more likely to justify a high cap hit? Now as a young and dominate player, or 5 years from now? Provided he's the rare exception who plays well into his 30's, paying well less (cap-wise) than the market rate in 2020 helps the team more than paying slightly above.
The team isn't winning a SB based solely on the money freed up from restructuring Tyron in 2016. The team needs to abandon the "one player away" approach and build for the future. Not restructuring him actually allows them to get that one player when they truly are one player away. It also avoids the Brandon Carr situation where a player is retained longer than he otherwise would have been. This isn't a likely outcome barring injury, but what if injury occurs and he falls off? The team carries a guy solely for his cap charge yet again?