I don't think the era of shit coins will ever end as time goes by, they will increase. They will be used in different things which may become our need, Apart from this, those who do rug and pull will also need them and it is also important for those who are thinking of becoming a millionaire in the short term.
I don't know about this thinking. Did you mean that we need this because of short-term profit and to become rich instantly? How about if they fail before it happens? I'm not sure how you can afford to take risk investing shitcoins which literally you don't have any assurance that will give you back at least a small profit but probably losses.
What we need is a sustainable market project like Bitcoin and ETH, not these worthless coins that only ruin the image of the market.