Genuine question, not rhetorical challenge:
On my home server, GvG is critical for guild standings. If that's universal, how will GvG die a natural death? If ambitious guilds must have a strong GvG presence, it's never gonna die.
You really think there are that many players who care about guild standings? I have been in dozens of guilds over my 6 years of playing, and it has literally only been mentioned to me in the context of recruitment. Once in a guild, it was never discussed as a goal. And I've been in big guilds and small over the years. I would venture to guess that only the top 5 or so guilds really care much about guild rankings. You apparently only have experience with these top guilds, not the ones down the chain. The ones below the very top ones know how locked up GvG (and now GBG) is by the top guilds and how little chance they have of breaking in and "running with the big dogs". That's why there's so much passion about changing or not changing GBG. Because it provides lucrative personal rewards that players actually care about, not the intangible and literally worthless reward of guild standings.
Your problem, it seems to me, is that your insulated game life has made it impossible for you to conceive of a game life without GvG, or the pursuit of guild ranking. I and many, many other players can tell you that there is abundant game life in FoE completely outside of GvG.
As far as whales being in top GvG guilds, that may be true but misleading. They are not
only in top GvG guilds. And from what I've seen in 6 years, most spending happens in and around events. And this is probably more true now than ever. Anyone spending tons of money on GvG is an idiot. It is literally the very worst value for your dollar in this game. There is almost no tangible game reward for playing GvG. In addition, if someone is ambitious enough to care about GvG and pursuit of guild ranking, they are going to have enormous attack boosts and a high level Traz. With the GvG defense boosts topping out at 75%, what reason would they have to spend on GvG? By myself, I can go into FE GvG right now and fight as long as I want with only a modest attack boost and a middling level Traz. I run out of targets long before my supply of units ever gets so much as a dent.
In any case, you and I don't have access to raw data. Playing data or financial data. Inno does. And they have said
repeatedly that they will not do anything but the barest maintenance on GvG. Ever. And they've been saying it for years. Again, anyone spending tons of money on GvG is an idiot. If GvG does go away at some point, what will they have to show for it? To quote Edwin Starr, "Absolutely nothing".