I agree it is said that shitcoins really depend on luck, most of my shitcoins from year 2018 are still shitcoin today and counting, expecting profit from shitcoin is just like a dream, people called it shitcoin because of the very cheap value and most of the investors really don't invest on shit coins because it is double risk than investing into meme coin.
Shitcoins are coins that can't be relied on for a period of time so it's very hard to get a high value and even not worth at all, so this is little different from a meme coin that can still be relied on for the short term when the hype season starts to come on or a temporary pump of effect good news about it.
So some people today still find it difficult to understand and distinguish these two things, so they are still very often said to be the same thing.