That's an odd take. Most of the discussion that I see online about detrimental aspects of Canadian immigration levels are focused on housing prices/availability than health care.

I think most people acknowledge that immigrants are young and relatively more fit and therefore don't consume health services nearly as much as aging, western boomers.

The major issue we're facing due to the high immigration levels is the strain that it's putting on our housing availability levels. Those 270k people/year need to live somewhere, right now and that has direct effects on cost of living of everyone in Canada.