I don't think anyone in this thread actually believes monero could overtake bitcoins mainstream adoption, EVER.
Now that said, blockchain bloat can be an issue but lets take this into perspective with the quote above.
If bitcoin is the actual threat to the current banking industry we could view monero as the offshore banking currency to bitcoin.
I wonder how many people here have actually used offshore/swiss banking? Fees are much greater than traditional US/EU banking and people accept them on a daily basis because the offshore banking provides them whatever service they require.
Offshore banking in general is much riskier than traditional banking aswell. Anyone with the slightest experience in any type of offshore banking will confirm this in a split second.
Now my point being, whether it is Monero (likely at this point in time due to its tech) or another crypto down the line, blockchain bloat will be the least of the intended target audiences worries. These are the same people you are targeting who pay much higher fees in the real world for these services and a bigger blockchain is in reality a joke in comparaison.
Sometimes we step too far away from the real world problems that can be solved and dwell too much on smaller technical issues that are definatly acceptable in some situations in regards to the solutions they offer.