ipsc is not practical and does not teach tactics but its hell of fun!
idpa ditto, though they do give you some rules to protect yourself. they made too much rules. you should only engage target x at this port. though you can see it way back. do a tactical reload here. you cant use this kind of gun though you carry it.
The bottom line is both are games and you need points to win.
But in real life its different. tunnel vision. targets behind you etc.