Now you're distracting this discussion with semantics, but still not answering the question. The royalties your apps generate fund the salary you ultimately draw from the business - this of course depends on how your business is organized and how you account for expenses, etc.... But the royalties are revenue - that's the important point.
But, you haven't answered the basic question which was: Do you earn a the equivalent market rate for a software engineer from the App Store? To answer this question you need to consider if the royalties you earn from your apps minus business expenses leaves enough in your business accounts to pay yourself the market rate for a software engineer. This is not a hard question to answer for someone in your position (40 years of experience). So if we believe you the only possible explanation for your spin is you probably don't.
I'm in the exact same arrangement you are. I've had apps in the store continuously since 2008, which is over ten years now. By early 2009, I was able to generate enough revenue from app sales to pay myself a full time software engineer salary, even after accounting for business expenses. Unfortunately, that is no longer the case, and it hasn't been for about five years now. I've been able to do consulting work through my entity to generate enough revenue but consulting revenue is not relevant to this discussion.
In essence your case actually proves my point which is: The app store is not working for small developers. Both you and I have been were there in the beginning, yet neither one of us created a viable growing business. Yes, others have had better success, but not in a very long time. Yes, there are Venture Capitol funded startups that have turned out well, but a lot that have gone nowhere. VC funded entitles that entered the iOS ecosystem cannot be compared to self funded efforts like yours and mine. VC opens doors, the lack of it closes them - this was/is "Designed in California" by Apple.
I had a "pipeline" of new app ideas, upgrades to existing apps that were selling well, and even was able to discuss buying another small developers apps to integrate with my "portfolio / business plan". None of those plans came to fruition because the App Store could not generate enough revenue due to its forced policies, specifically related to monetization. Along the way I also paid for 3rd party graphic artists, and other "support services" that I had hoped to eventually hire in at some point. All the 3rd party resources I used expected my business would take off, and all were as befuddled as I was when Apple went in the wrong direction and forced small developers to grind to a near halt.
So I believe you do what you do and that's fine for you. But an industry is not considered successful unless it grows. If Apple (or any company) only generates consistent revenue without year to year growth, its stock would tank. Apple has failed to realize the policies it forced by fiat on App developers inhibited growth of the mobile app software industry. Without that growth, new ideas have stopped entering the ecosystem, and without them Apple will descend to a commodity vendor. Apple cannot survive as such a vendor.