I actually get it a lot less than I would expect, so no need for an apology. You may find it interesting that I actually use Linux an increasing amount of my time. However, it's still only a small fraction as of now, so the question is still valid :)

To answer the question of why I use a Mac: mostly because the hardware is good (I'm on a early 2015 MacBook Pro), the software consistent and high-quality (I refuse to run Electron) and the tooling fairly decent (I have UNIX, and MacPorts, and I can compile the rest). And it works extremely well with all my other hardware, which is something that Linux still doesn't really do well. And by this point I have enough macOS experience that while I counter-intuitively probably have more complaints about the OS than most other people, I also generally know how to fix it. While it's often compared to iOS in how annoying and locked-down it is, it's really nowhere close. Out of the box, it might be approaching that point, but macOS holds the trump card of being able to pretty much turn off everything you don't want. Want to debug a system process? Turn off SIP. Want to let your shell script manage your mail messages? Insert it into the TCC database. Apple thinks some operation is something only their code should do? Well they can pound sand, I can turn off AMFI. macOS lets you do this, and as annoying as it is to keep doing all of this it hasn't yet gotten to the point where it's enough of a drag to make me stop using it.

The answer to a slightly more on-topic question: why would I develop for macOS? The answer to that is really "I mostly don't". I have much more iOS development experience (although my most recent job in that area was actually "spotting exactly what part of your app is pretending that it's using native controls", not actual programming). I know enough of AppKit to be useful, but actually write very few apps. Most of the code is just regular old stuff that would work equally well on Linux and I just happened to compile for macOS. The rare exceptions are if I am writing something for myself (in which case I care little about any codesigning stuff) or I am contributing on an open source project (in which case Xcode takes care of this for me). I only hit these notarization/Gatekeeper hurdles recently because this particular thing needed to run on other people's computers and and had to be manually cobbled together for complicated reasons which I cannot describe at the moment.