It depends right? Anti-stealth using long wavelength radar is just going to tell you there is a stealth aircraft in the area, you still need to put a fair amount of effort into actually obtaining targetting data.
In a shooting war I would assume h-20 to be just a stealth cruise missile truck, hopefully with some jassm equivalent to increase standoff range and hit probability, it would be very risky to use a fancy stealth bomber to drop a bunch of bombs right on top of the enemy, guided or not.
In a modern battlefield, there are just too many threats that can take out a subsonic heavy bomber, no matter how good your stealth is. There are very few things that would warrant sending a super expensive bomber in that could not be done using a ballistic missile launch.
Anti-shipping being one of those core capabilities that a bomber still has an edge over ballistic missiles.