Would you sign up for a running club and ask why they aren't doing triathlons?
They're allowed to engage in sport on the terms that they want to. They also probably wouldn't put much stock in your opinion about the most natural or competitive form of sport. They might even strava you to see if you have any relative experience or insight to back up your very strong opinions.
In case you were curious, the reason you're being dismissed out of hand is that basically this exact same idea was pitched eight years ago with "prolander". A guy who had the exact same arguments about why 6s is bad made a tournament with a big prize pool. The best players were interested in the money and competed. It died out not too long later because all the 6s players would rather play 6s, and the highlander players would rather play highlander. You can't just tell us that we're committing a logic fallacy when we tried it ourselves and decided that we would rather just do this instead. That's okay!
Also, none of the "stalking" is anything outside of the general norms of this game. It's pretty common to check someone's game logs--that's why we all have the plugin on our servers to upload them automatically. https://logs.tf/profile/76561198116072296 See, here you can with a few clicks see almost every game I've ever played as well as my steam account, RGL account, TF2Center account, UGC account, and ETF2L account. If you want, you're also free to find my ESEA account, but that may require a few more clicks. Feel free to look at any of that, it;s all public and not creepy to check out.