Agree, there's no tactical advantage to macross paint schemes. It's all about character ID in the anime and selling merchandise... another big part is inspiration from 70s tomcat hi-vis color schemes.
Camo patterns are based on both airfield conditions and training tactics. That's why USAF fighter have similar schemes (dark grey tops to match asphalt, and low-vis gray on the bottom), while many air forces in less-developed militaries have camo pattern tops to match the environments of less-developed air fields. Navy fighters are typically just low-vis all over, since there's no advantage to blending in with the carrier's blacktop when the carrier can be seen miles away by itself. Russian Flanker camo is designed to breakup the outline of the big fighter against a blue/grey sky. Some F/A-18s even had a false canopy painted under the nose, as a deceptive combat tactice tool.
I agree hi-vis colors for aces are a relic from past wars - we forget the ultimiate hi-vis ace who used color to instill fear - the Red Baron and his red triplane.
Getting back on topic, I agree it's cheesy to have a different color hi-vis stripe on each valk. However, DYRL wasn't really grounded in reality, even within the macross universe. I think Max's 1S did have a 001, after seeing some for product pics.