Two things
First
AS long as the site mixes professional comments with public comments unless you know treat them all as public comments.
Second
The NSW law is clear you cannot enter a private property without permission, the strata act intention is equally clear you can only enter to maintain common property that is accessible from inside the lot.
65 Can an owners corporation enter property in order to carry out work?
As the work is not carried out or need access from inside the lot no entry is allowed.
Or in plain English he is not entering to carry out work in the lot or from inside the lot
The fact that the easiest access to the location is through the lot is irrelevant especially as there are other options.
Can the gardener with the lawn mower walk through the ground floor lot as it is easier than walking round the lot as after all he is going to maintain common property?
Common sense should as well be applicable like the difference between changing one or two tiles too totally re tiling a large area