The thing is that things may be back to normal by July (e.g. no travel restrictions and it is safe to have that many people crowded together); but, things are not normal now. Athletes cannot train properly. In some/many cases, qualifiers have not yet been done and cannot be done.
Not fully true. There are minimum standards that need to be met (sometimes waived for very under representend countries/regions). This is both for the individual (you may be the best/second best in your country, but if you don't mean the standards, you still do not qualify for the Olympics) and for countries (certain qualifying events will determine how many athletes a country can send for a given event - though the athletes at the qualifying event are not, necessarily, the athletes that will be sent).