Fighters cannot reach at Chinese cities, they simply lacks endurance.
The Tu-160 can't penetrate that far, hence long range CMs.
To go that far in, even stealth bombers need escorts. Like the B-21 is expected to be escorted by the NGAD. We are not capable of doing that. And the Tu-160 will definitely get shot down.
The point of the Tu-160 is to mass long range fires and threaten certain geographies that fighters cannot reach, like Diego Garcia, ECS/SCS, Persian Gulf and the Red Sea. It's a capability we will need in the 2030s, not this decade.
It can also be seen as the IAF's answer to the IA's IRF plan.

