Altcoins have made people rich. This means people who missed to invest good on bitcoin preferred altcoins. People who had chosen the right altcoins have benefitted good out of it. Altcoins have served as the best investment and as a good competence asset. If there were no altcoins the market wouldn't have flourished to this level.
I dare to say that the good altcoins with and actual purpose and use are infinitely outnumbered by garbage and one can not deny it.
the way I see it, the even though the vast majority of shitcoins do not have a significant volume or market capitalization (in comparison to Bitcoin or top alts) still all of them together subtract dominance from Bitcoin, which I do not like much.
Each of us is free to invest wherever we want and we are free to fork a chain and stick a doge picture on it, but it is different when the volume and liquidity which could be used for Bitcoin or top alts ends up being rug pulled.

That is the sad fact about the coin market right now, there are way too many that is useless and shitty and very few that are liked by many and work for something. I know not many people like to hear this, but that is the truth and there is no going back from that at all.
Just realize that we can't do anything about the current situation and how many new tokens are pumped into the market everyday, and we need to learn to ignore them until they give us a reason not to. Look at launchpads and see how they are pumping millions into projects that worth absolutely nothing, and you will realize why it is a shame this couldn't be done better.