Great question! It’s very important to be able to strike two or more parts or the drum kit at the precisely the same time (including snare and bass drum), and the only way to gain that ability is by practicing it until you can execute it without a great effort. But you need to keep in mind that there is a rudiment called a “flam,” in which the player intentionally plays two strokes at slightly different moments — one right after the other. You can watch a video about playing flams by clicking here.
It’s important to be able to play whatever you want at any given moment. Most drummers feel that the art of drumming is an ongoing learning experience. A drummer should never reach a point where he or she feels that there is nothing more to learn, because there are always new techniques, or styles, or sounds you can incorporate into your playing, which will make you a better drummer.
Best of luck!