Almost everyone is wrong, and only because; Bitcoin is not at all about all the deep dips but the stabile growth with the high peaks. That's it and that's all of what most of them just don't get.
Everyone is really overexaggerating I would say. There were huge dips in the past and we can't really deny that, people are free to say it like that because it was real and true. Those huge dips were a great opportunity for us to grab some bags with cheap price and then you had a chance to get a bigger profit when it's the right time in the future. There will be always some of those in the future as well, you can't avoid that.
Those people like OP that say it's not about the DIPs, or about buying those DIPs, are those same people that denominate their capital in fiat. DIPs, and buying those DIP, would truly matter if we denominate our investment capital 100% in Bitcoin. The more you buy the DIP as a buying strategy, then the more units IN Bitcoin you'll HODL.