I mean I WOULD if ever thought anyone was serious about it...
I've only ever seen that as a kind of morbid fan-joke and occasionally a comment from villains who are trying to shake Robin off his game, not as a serious suggestion that Batman is using him as a distraction.
In comics, whenever it comes up, Batman always complains, but lets Robin (the first one anyway) get away with colorful because he insists on it, to respect his parents. Jason got the exact same costume because Batman was kind of using him as replacement Robin, Tim is a fanboy and strongly believes in the identity of Robin and thus makes only small modifications, and as for Damian, by this point, if he wore anything different, he wouldn't be seen as Robin and he couldn't
stand that. So we really have Dick to blame/thank for their color coordination problems.
It's also kind of obvious Bruce had zero role in this decision, because if he did, Robin would be called "Batboy" or something like that and be wearing black. Bruce's design aesthetic is pretty straightforward.
From Batman: Dark Victory, Bruce is kind of shocked by Dick's color scheme (first thing he says when he gets a chance is "What IS that your wearing?") and tries to gently convince him to wear something more practical, as shown below:
The Origin of Robin.jpg