You're right about that. But people don't care which is the real Ethereum or which one is the "copycat". What they care about is which chain has the most dApps, tokens, and services behind it for a great user experience. Despite ETC being 6 years old, there hasn't been any kind of innovation that would help bring the masses into it. What developers have only achieved is "diffusing" the difficulty bomb to make ETC a PoW blockchain forever. But that still hasn't attracted other developers to build dApps on its platform.
After Vitalik and the core team members left after the DAO fork, the initial coin, Ethereum Classic ETC is like a dead coin. Lack of developments and innovations are reasons ETC has very low price. At least it does not dead but it is not a good coin in eyes of investors who are seriously with their capital.
Without enough developments, we can not expect about innovations from ETC. Without innovations, it is hard to see price growth because the value of ETC does not rise without innovation from ETC team.
Without quality dApps and/or tokens, how would you expect ETC's price to go all the way to the moon? It's all about utility in order to keep demand at its highest. At least, we all know ETC won't go away that easily because of its established presence in the crypto/Blockchain space. ETHW, on the other hand, will die quickly because of the lack of a solid foundation behind it. The cryptocurrency was only created to enrich miners and developers without focusing on its utility. Why would you want another PoW ETH-based chain when you already have ETC?
People invested in ETC just because they hope ETC will move together with ETH. ETH is a leader and can lift ETC up after ETH has its bull run. ETC is like a parasite on ETH in the market and you are right too that miners left from ETH to ETC can be another reason people still believe that ETC will have other bull runs.
After ETH The Merge, ETC network becomes bigger and stronger. It has bigger communities and ETC enthusiasts believe that the game for ETC will be bigger as well.