That's the whole point. Google is able to prop up otherwise-nonviable businesses with the revenue from their cash cows. This means they are able to undercut an

That's the whole point. Google is able to prop up otherwise-nonviable businesses with the revenue from their cash cows. This means they are able to undercut any possible competitors in those spaces by operating those businesses at a loss. That's the very definition of using monopoly power to push into and dominate another market. It's not a reason to say, "Welp, we can't break that up! Then those businesses would just flounder and die!" It's one of the primary reasons to say, "We must break that up." If the otherwise-unprofitable businesses that get spun off want to continue to exist, they'll need to find ways to raise prices and/or cut costs. In other words, they'll need to compete on a level playing field.