I know its bollocks.
They are admitting now that you can be a bit colour blind and still not crash.
To be honest I do know commercial pilots that are completely colour blind which developed with age (which is not meant to happen) who don't crash either. And one that knows all the ishra plates and the order, who he got off his mates going before him and got through outside Europe but flys in regularly. He can see the difference though in the PAPI's
So the new word in the regs is colour safe. And it used to be a requirement for the IR and now they have deemed it a requirement to fly commercially. It seems they don't want any day only commercial pilots which is going to screw up some instructors as you have to hold the license you are teaching for.
There is a huge thread in the medical forum about it all.