There is no fixed block size issue because by most people's estimations, something like the relay network is required for over 500k-ish blocks. Because there is currently no alternative to the relay network that isn't opt-in, this just makes it a cartel creation type of tool to exclude various adversaries from interacting with the network at all.
What do you expect, Monero is just gonna scale to 100mb blocks with no side effects? Monero does not solve Bitcoin scalability issues. There really is no huge scalability problem in the first place. I estimate around 8MB blocks is what is needed to have $10kish transactions and higher valid for on-chain use as a major world currency. That's just within capability of catching mainstream consumer support.
I see crypto currencies today are where credit cards were 60 years ago. I am sure many people in 1956 could not envision a credit card network processing 10s of thousands of transactions per second using punched cards and tabulating machines. They designed credit card and payment card business models around high value transactions where the retailer had very large margins. The dominant Credit Card networks of the day were Diner's Club and American Express. Who are the dominant Credit Card networks today?
Bitcoin is heading with the above model to becoming the Diner's Club of crypto currency, while Monero at least has a chance of becoming the VISA of crypto currency.
By the way 10K USD and above is the kind of money where the existing banking system actually starts to become very competitive when it comes to transferring money internationally.