You're making a mistake that many nerds make, and that is to assume that most people are like yourself. If you explain to the average "normie" who is just buying crypto now (because Elon Musk told them it's ok) that they should mix their coins, but that there is no way to know who they are mixing their coins with (could be a child trafficker or a money launderer or a RUSSIAN HACKER!), ALMOST ALL OF THEM WILL REFUSE TO MIX THEIR COINS. I can't even get some people to install Signal because they're such terrified normies.
You are overestimating the number of people who even WANT to mix their coins.
...or a non-violent marginalized group of activists that are being targeted by banks and governments. Perhaps you should be explaining to your normie friends who invented Tor and why the US government wanted to hide amongst the crowd.
Those with power don't just seek to attack but also disarm the normies you talk about. These are the same people that gave us "privacy laws" to discourage me from stalking you yet granted exception to themselves to track you, spy on you and retain data as they so please... to protect you from the Russian hackers but also from the activists that dare to revolt against them.
I do not underestimate those that want to mix coins. A minority of people mix their coins, that doesn't make their opinions worthless or gives anyone the right to curtail their rights to free speech.
I understand to the normie, the balance and history in their wallet looks like a flat record of account but, in fact, the bitcoin / dash protocol is a language. An agreed language of how to proceed. This is one reason why computer code - and digital cash - is free speech. It's also a protocol / language you are free to participate in, or not. If you'd rather speak bitcoin and taproots, be my guest, this is what a free society looks like.
Tbh, coin mixing is only effective if you know what you're doing. It's good in so far that you can implement it on most chains, but for true privacy there are better technologies. For the average user, coin mixing is too slow. Imo it should be an invisible and a non-interactive process to the end user.
I would be very happy to see a wasabi style alternative for dash. And I'm very much encouraged that Dash Electrum is working independently to improve privacy. But none of this would lead me to the conclusion that con mixing be removed to appease banks and governments. Having said that, I have no problem with coin mixing being an optional plugin to the desktop wallet.