Shitcoin moon is coming, to the detriment of BTC no doubt, holding it back like a kid on a leash.
But it will flow back into Bitcoin eventually, you can use it as an opportunity to stack sats
It is probably not healthy to consider shitcoinery as a zero sum game. There is all kinds of symbiotic dynamics going on, both good and bad, and even if we might spend a lot of time, bashing on shitcoins (that they certainly deserve such bashing above and beyond), there remains a certain amount of descriptive reality there in the sense that "it is what it is," and bitcoin likely gives few fucks about the shitcoins, and surely sometimes will benefit from them or have some image distractions, but what can you really do about dumb in the world? Scammers are going to take advantage of dumb to as much of an extent as they can, but sooner or later, like you mentioned, the diverted value will flow back into bitcoin.
There is ONLY so much that can be done regarding how people are going to be mislead into various shitcoins and the process likely just has to play out, while, at the same time, we can continue to call a spade a spade and to denigrate shitcoins in various ways along the way, just like we denigrate roach for being a dumbass, but it is not necessarily going to stop him from being a dumbass, including some other dumbasses who he lures into believing that gold is the future.. blah blah blah.