Nailed it.
This mentality of "your side my side" is prevailant in in-experienced doubles (especially really good singles players). The guy will be "waiting" at baseline, and gets frustrated at the net partner for "stealing" ball coming to his side and making a volley error. It is not about whether the baseline guy "could have" gotten to the ball (even if he could have hit a good shot from baseline). It is about whether there was an "opportunity" at the net.
If there was an opportunity at net, going for it at net is the CORRECT doubles play. If you don't have the volley skills for the level, then either develop it or stop playing doubles for that level (irrespective of your baseline level).
If you want to stay at baseline and "expect" the net partner to leave your side of balls to you so that you can hit a good baseline shot, you might want to re-think whether you really enjoy playing doubles, or should have just stick to singles.
Most of the time when a "baseline" guy complains that his net partner is taking over too many balls coming to your side (and making too many mistakes at net), the reality is different. The baseline guy should check whether he is coming IN enough and closing the "gap". By staying at the baseline, the baseline guy is possibily leaving too much open area for the opponents to hit to, which may lead to too many balls hit to that side of the court. This essentially takes away your net partner from the game, and makes his life difficult at net, eventually leading to wrong decisions/errors.
In good doubles, just closing this gap is good enough to pressure the opponents and extract errors. Many times doubles are not won by great shots, but just by placing the body at right places.