You mean the Troyans have to come in a horse cause without the horse they don't get anywhere near the castle? I don't know if that analogy works here ... Bitcoin was perceived as private for many for very long and institutional adoption wasn't the driver for the first 6 years and with Bitcoin winning, institutions couldn't have ignored it forever.
Discussion
To some extend this is like enabling shitcoin into bitcoin through trojan horse method. Also, e-cash is not cash. Its not even what the original e-cash intended as original e-cash removes 3rd party banks, not establish 3rd party banks.
This "e-cash" is token, similar to the token you use in casino.
You can exchange hundreds of thousands of "bitcoin valued" tokens and sure, lots of "privacy" but , it wont impact bitcoin transactional value used in the casino other than what you use to buy and sell the tokens.
Cash on the other hand impacts all transactional value and this is valuable economic indicator on how fluid bitcoin is.
Maybe there are use cases and we should look into that. I am 100% for looking into the use cases.
But the misconception and misbranding is what worries me. Most people are not able to explain what it is but are drawn into this herd mentality.