Yeah that's totally fair & we try to be pretty upfront about the issues (FAQ + forum). There's definitely a lot of bubblegum and duct-tape on this at the moment - been putting a lot of work in to fix the bigger issues ASAP (been modeling a lot off the AdGuard approach / targeting parity).
Really making the longer-term bet here that with a lot of work, the underlying proxy infrastructure will enable a lot of really interesting possibilities, and the shorter-term bet that with this approach we can create the best / most effective adblocker for paywalls by far.
TL;DR - we can unblock a lot of things with this approach that browser extensions can't; it also works across all browsers (esp. relevant for Safari users).
Digging in, there are a few reasons actually - first is, Chrome removes extensions with this kind of functionality from the Web Store constantly (only option would be to sideload).
Under the hood, Incoggo is also actually a local proxy (it adds a trusted root cert during the install process - we have some details on this / other potential issues / concerns on our forum). Reason for this being, Chrome extensions can't modify inbound requests in the way that's required to unblock several of the publications we support (NYT, Bloomberg, WaPo being key examples).