Let's say that the latency wasn't an issue and that the input latency introduced was so low you wouldn't notice it all. That might be true but then you might be a pro and that additional 1ms is a problem, but let's assume at least that the encoding so so good and fast that its basically wired.
Even in that circumstance wireless mice have a problem, battery weight. No matter what you do a wireless mouse is going to weigh more than wireless, and inertia is therefore going to be higher. It will take you longer to move it and its harder to deaccelerate it such that you end up on target. The batteries can often make up 50% additional weight, and its far from negligible as a problem.
The ideal mouse is flawless, can track at very high speeds precisely your movement, fits perfectly and weighs absolutely nothing while allowing you to rest your hand/arm weight on it. Wireless adds some lag and a lot of weight and reduces potential cable tangles, but modern mice come with better cabling as well. Its less of a problem with a tidy desk, a big mat and a decent cable on your mouse.