"Good people who are here illegally"? How can we call them good If breaking the law is bad? On the other hand if breaking the law is not bad, the rule of law is undermined as a governing principle.
What is good for the country about having people here illegally? Yes it may be "good" for the illegal but for the country it is not good (a) undermining the rule of law (b) encouraging lots of bad" people to come here and (c) overwhelming our already overburdened finances.
Note that education reform is included as a solution to the problem. Aside from questioning how the rewarded lawbreaker is to be taught to be a lawabider, the cost of this "reform" will be enormous and will be paid for not by the illegal but by the US citizens.