In an open free-market environment we should have access to the entire market, whatever that might be.
Nonetheless, this should not be facilitated if the broker cannot provide a stable service and it becomes a problem for the entire underlying market access.
But I believe this will sort itself out. Just like everything that has been digitised in the past 10 years there is a point when too many users join and start accessing a particular industry/service and create a bottleneck.
This is is nothing special. This is just a black swan event (too many people are day trading) on top of another black swan event (COVID).
The market just needs to correct itself and also brokers and market makers need to scale up their platforms. Why they haven’t done it already after a year of this high levels of trading I have no idea?