-Thats not a reason....is HBS scared they are going to be boycotted if they don't please every single category out there?
On topic:
Donvale why dont just download the mod? no need to ask HBS to do something they do not want to do.
PS
other games have an "optional feature" when it comes to accommodating the color blinded folks, as not to ruin it for everyone, so HBS' weak excuse doesn't hold.
I have, but that's kind of irrelevant to the suggestion because:
1. HBS don't officially supports mods, this means a multiplayer can't use this solution without massive bother. I am also on macOS and frequently require wiping the machine, the mod mechanic is troublesome to set up every time as I have to migrate files to Windows, run the modification tool, migrate back to macOS.
2. The mods genuinely make the game both better to look at and easier to play, they also have zero impact on the mechanics and require minor effort to implement, my suggestion is all players should be able to benefit from this. They can also be easily implmented in such a way that they have literally zero impact of those not interested in them, i.e. all lines left as red for example.