Fork ~ clone and they will end with no interests from community, investors, zero value.
But blockcain networks are made up of people, if there's a motivation to fork, it will be valuable for those people.
We laughed at Bitcoin Cash, but it's still fighting a war of attrition against Bitcoin, still supported by a motivated minority.
Clone coins ad clone ones no matter their developers refuse that fact or admit it. What you said is right but I believe you forgot one important thing of clone coin. Fundamentally, clone coins don't have any new technical specifications (modified or improved from original coins). They simply are cloned and renamed before running marketting to attract investors.
Fork coins, on the other hand, have some technical improvements from original coins. Such fork coins can get attraction from investors and community (or can not) but they are truly fork coins.
I'm not talking about the Github repository copied, and a new blockchain boot-strapped, with a new Genesis Block. I'm debating/hypothesizing about an actual fork of Decred, with true/loyal support by a determined minority.