I would add the idea of perhaps being too sweaty to sit in a stadium of people after cycling there
Possibly the hassle of getting changed to avoid that
Storage of things (even if you don't get changed and thus have the change of clothes to worry about, you don't seem to be able to take your helmet in with you, maybe you cycle with other stuff (repair kit, just in case, etc)
Not being able to drink and cycle
Sweaty ? I’ve run to the Amex from Burgess Hill for early season games in 20 deg+...........nothing new about social distancing [emoji23][emoji23][emoji23]