Not even close. As just one recent example, the $96 million Diggs extension was made in the spring of 2022 when he was still locked up for two more seasons (till the end of the 2024 season). We then ate $31 million of dead money when we traded him. I believe that's the largest dead hit in NFL history for a non-Qb.
Bosa's guaranteed $12 million this year ($12.61 total) pales in comparison.
If Bosa misses more than half the year and playoff games it won't look good. But if he can still get to the quarterback in some big regular-season games and in the playoffs, it will be fine.