^^^Yessir, if a zipper fails, the case is useless. BUT, if the zipper is as sturdy as the rest of the case, the advantages are numerous.
I offer this as a consideration since the good-quality guitar "bags" have been around for a loooong time, and have a road-worthy track record. You have to look no further than Mono and Reunion Blues to see that these two brands have endured years of testing in the market, and both enjoy nearly ubiquitous praise. The reason is clear: these cases offer protection that professionals require, endure the rigors of professional use, and they don't break.
My personal experience pales in comparison to serious musicians, but if I may add that my
non-pro gigging use of Mono proves that this is the solution for me. For many years of use (again, gigging as a weekend warrior, and regularly before this covid madness, but not a paid professional) my first Mono proved
so beneficial that I now have four of them (two electric single, electric double, and an acoustic bag). The only minus to a good gigbag is that you cannot stack anything on them, duh! But as for the normal transport and usage, they offer the protection you
demand for an expensive guitar, arguably
more protection than a HSC, but lighter, with backpack straps, and storage areas.
A cheap gigbag is like a cheap backpack, and we've all likely faced that frustration of a ripped seam or failed zipper. But serious outdoorsy types trust their very lives on serious backpacks, which are serious pieces of gear
because they are designed and built to deliver. A quality gigbag is no different. Caveat: I have no idea where the Aerocase falls on this spectrum. I am simply saying that any truly good bag is a genuine piece of quality gear worth owning.
Edward