Would it be realistic for every person in the whole world to fit in the New York Stock Exchange trading floor so people can submit their trades manually themselves? Of course not, that is why you have 3rd parties to manage the so-called "dust transactions".

Say 1 BTC is $20,000 and 0.001 is $20. Sending $5 or even $100 may not be practical, but a low fee 3rd-party wallet for day-to-day spending is just fine. The real value will be in your "savings" aka your cold storage.

If you modify BTC into an alt-coin it will be susceptible to more bugs, more issues, more security risks, etc...

Bitcoin will gain MORE value over time if people leave it as-is, because the antique-ness of it will be sought-after.

Owning the First Crypto will bring nostalgia, where-as anytime you change an original it loses value.