The problem with the "only let immigrants settle in regional...

The problem with the "only let immigrants settle in regional areas" argument is that there are very few skilled jobs in the regions. Some, but not a lot.
So you can't really say only bring in skilled migrants, and, they should move to the regions in the same argument.

My understanding is that the vast majority of immigrants to Australia are skilled. As below, skilled workers made up 70% of adult migrants.
https://www.homeaffairs.gov.au/research-and-stats/files/report-migration-program-2018-19.pdf

"Skill Stream
The Skill stream outcome was 109,713 places, which accounted for 69.8 per cent of the total 2018-19
Migration Program outcome (excluding Child stream).
Within the Skill stream:
 The Permanent Employer Sponsored Entry (PESE) category had an outcome of 42,012 places. It
comprised 38.3 per cent of the Skill stream outcome, with 33,025 places (78.6 per cent) under the
Employer Nomination Scheme (ENS) and 8987 places (21.4 per cent) under the Regional Sponsored
Migration Scheme (RSMS);
 General Skilled Migration (GSM) had an outcome of 60,240 places. GSM compromised 54.9 per cent of
Skill stream outcome. GSM includes the following categories:
 Skilled Independent
 Skilled Regional
 State / Territory Nominated;
 The Business Innovation and Investment Program (BIIP) had an outcome of 7261 places (6.6 per cent);
and
 The Distinguished Talent category had an outcome of 200 places (0.2 per cent)."