As one person can bleed the brakes on a bike it isnt needed. If you want to get something fancy look into speed bleeders.
There no way I can reach my left front caliper and front brake lever at the same time without being a contortionist so on a bike with a full fairing bleeding brakes is a two person job.
I've been using speed bleeders for about 15 years and they make it a very simple job for the 3 calipers + clutch I have to maintain. One thing not mentioned in posts is that you have to keep the master topped up with fluid as you bleed. Adding fluid with the speed bleeders is very easy, you just stop pumping the lever or pedal, top up and then continue.
I think the one scenario where a vacuum device would shine is where you've disassembled the system to replace hoses, pistons, seals etc... and the whole system is full of air. Pulling fluid through an empty system is probably quicker then pushing it via pumping the lever, although both will work.