The problem is that nothing has really changed in why we banned large events like this in the first place. Large events like this are a massive risk, not just on an individual level, but because an event with tens of thousands of people creates many opportunities for community virus spread, which could kick off outbreaks outside of those events, both in the local community and when people go home from the game and take the virus with them. Even if it isnt premature to be doing all this opening up (which a lot of experts say it is, but it is what it is right now) that doesnt change that large events will remain an issue well after everything is open.
Given that, and given that 30k packed into their normal seats is going to be just as much of a spread risk as 60k is, to push ahead with this shows a massive disregard for the health of the community at large. It should still be "football with no\few fans"