I think you're wrong.
China has also canceled all tennis tournaments this year and many other tennis tournaments are questionable, even in Europe.
The UK has also introduced quarantine for visitors from Spain, restrictions on borders are expected to be tightened in the autumn and all this will have a very bad effect on the tennis season.
It is absolutely true that not only in the US is the big concern related to the COVID-19 pandemic, it turns out that in some Asian and European
countries the same is true.Some tennis tournaments must be postponed, therefore fans of tennis are simply made stressed by the current conditions.
Hopefully the vaccine can be found soon, so we can enjoy a normal life again. And not only tennis tournaments are now affected by the corona virus,
but other sports experience the same thing.
I can understand what everyone here is feeling as a tennis fans because at one hand we’re eagerly wishing to see our favourite stars in action, and on the other hand we don’t want them to be infected by this virus too. Furthermore I believe that these stars also need to think for their families before coming to US, and at this stage we should support their decision irrespective of whether they’re participating or backing out of the tournament.
Sources:
https://7news.com.au/sport/tennis/more-will-follow-barty-out-of-open-murray-c-1207127
https://au.sports.yahoo.com/tennis-news-novak-djokovic-rafael-nadal-boycott-us-open-003637451.html