Of course we can't know what a government is going to do only 6 months into a pandemic but anyone with the slightest bit of common sense would realize that pandemics last a long time, years not months and that there are likely to be associated travel restrictions and these restrictions could also change at short notice - be relaxed or tightened up.
(warning longish post, I've put a TL;DR summary at the end)
When Covid hit in early 2020 Many industries/politicians at first looked at the SARs 2003 outbreak, in an attempt to model progress and amongst other things guess how long significant travel restrictions might...
As one example - this from a Hong Kong airport website looking back at that year:
"The outbreak of SARS in Hong Kong in March and the subsequent issue of travel advisory notices against non-essential travel to affected areas, including Hong Kong, by the World Health Organisation (WHO) had a significant deterrent effect on air travel. Although passenger traffic and flight frequency had fully recovered to pre-SARS levels by year-end,"
..so for Hong Kong, who were right in the middle of the SARs outbreak, it was 9 months of restrictions, certainly not more than a year..
www.yearbook.gov.hk/2003/english/chapter13/13_20.html
Elsewhere with regard to Covid from 20th May 2020 we find this from in an Australian source...
"According to the proposed timetable, Aussies would be able to travel to New Zealand and the Pacific from 1 July, with travel to other countries deemed safe under a bilateral health agreement to restart from 10 September.
However, it appears all international travel wouldn’t resume until after 15 December." (2020)
www.travelweekly.com.au/article/wondering-when-international-travel-will-restart-this-new-chart-could-hold-the-answer/?utm_source=Adestra&utm_medium=email&utm_term=&utm_content=Wondering%20when%20international%20travel%20will%20restart%3F%20This%20new%20chart%20could%20hold%20the%20answer&utm_campaign=Travel%20Weekly%3A%20Thursday%2028%20May%202020
It's unreasonable to think, as some people here obviously do, that a member of the general public was bound know, last summer, with absolute certainty, that the restrictions Aus had in force then would still be in place now .
If that ended up as TL;DR then to cut to the chase: Some people are most definitely using 20/20 hindsight and castigating the OP as a result.
Maybe the OP should have added a caveat of "if we can" to her original response to here son, but other then I think some slack needs to be cut..