4w5s and 4w3s have various advantages and disadvantages. That's just how it goes.
Also something I've noticed within my study of enneagram and observations of people is that people seem to strive to be more like their other wing. Perhaps this is to achieve balance, and they are unconsciously doing this? The 4w3s that I know generally have some intellectual pursuits, and 4w5s have random streaks where they love getting attention and promoting themselves.
One of the main things that made me notice this is when I was talking to some other 9's. As a 9w8, I sort of wish that I could detach more and not be so aggressive in debates and when I get a strong opinion. I also wish I were as disciplined as a 9w1. 9w1s are very terrified of any sort of conflict, even a debate, so they detach and don't seem to get opinionated (or just don't promote their opinion in a disagreement). I envy that. 9w1s though seem to wish that they could do confrontations and promoting their side of things like a 9w8 would.
Udog once told me when we were comparing our types (9w1 vs 9w8) that he wished he could engage in conflict as easily as I could. The thing with me, is if I have no desire to keep up a bond with someone I stop caring about keeping the peace. 9w1s just seem to always keep the peace. I sort of envy that as well, but what I do just seems to naturally happen.