You can't have your cake and eat it too! You can't, on the one hand, state that covid-19 is highly infectious (much more so than the common flu) + is much more serious in its effects (also in some cases for the young and healthy) + may have negative long term consequences, and on the other hand, adopt a laissez faire "assume that what we've seen does comply with whatever restrictions the government does have in force" attitude. This is how it started in the US when people ignored scientific advice and relied on the prevailing government instructions.Look at my post #1066.
Whilst I would agree with you if the tournament was in certain other countries, the chances of anyone in that crowd having Covid-19, whilst not zero, must be miniscule.
All it takes is one to spoil the party (in Serbia, literally). Serbia, Catalunya and Victoria have all seen what happens when the peak is past but people become relaxed and new clusters start.
The Estonian poster you quoted from the other thread is csillag and he said "Estonia has had only 0-5 new daily infections in the past month or so (on the rise now because last week a partying covidiot started a new cluster) and the health authorities have a pretty good handle on where most infections originate from. So like Meelis said, everyday life is pretty much back to normal since June. For now." The key is that daily infections are on the rise now and approaching the peak from a month ago in Estonia. I would hate to see a new cluster develop from this tournament.
This virus is not going away soon and either we are all vigilant and take all the precautions, otherwise we will never bring new infections down to zero.