Well, lets take a scenario, you taking a shot at an animal at say 5 feet(in a zoo say), now you have to quickly zoom out to take an animal say 500ft away, good luck fiddling with the DSLR, that's why most professional wildlife photographers carry two cameras, with different lens, also when you are at a beach and have to switch lens sand can enter the camera causing issues, unless you go for expensive lenses with wide range its useful to carry a bridge, so yes, if you are hobby photographer zoom is very much important, also bridge allows you to switch to zoom from macro or vice versa in a flick, something dslr's can't, although a bridge will never reach the quality of a DSLR.
Brings up the question, why doesn't camera makers take a bridge and put in a DSLR quality sensor? A perfect candidate is the FZ200, it has f/2.4 all the way to 600mm, why not add a dslr sensor?
but then again
if you are in the zoo shooting for deers and tigers, either you are not a proffesional photographer.
anyways for the sake of the arguement, lets say that (even though the idea of a photographer, that too a proffesional using a telephoto lens to capture a monkey in a zoo is still ridiculous and i cant stop laughing...

) you need that shot... so you will click it with a bridge cam? okay... then what do you have? a photo of an animal sitting nude so you can click a picture of him... which isnt even close to what he looks like.. and show it to your friends ? :O:
or let me put it this way... see i live in Delhi, and there isnt much of wildlife left which i can click, and anyways animals i can always see on the internet / zoo.... so i dont care much about them but i dont know where you live... if there is a jungle nearby... just call me.. ill send some guys over and get it destroyed.
Fuji HS20 Vs. DSLR Shootout - YouTube
Just for Fun.
lol at that comment, is this a "camera cum bazooka"

omfg
@tkin, all comments are in a light mood bro.. dont take them seriously.