You can say Canada has more needs in healthcare, tech, etc, but it's definitely not right to say it only needs this. All sectors are linked, especially in STEM areas.
To be fair, for the healthcare part, from my understanding, there is a main issue of new foreign workers cannot be licenced in canada after coming. So taking new immigrants in the sector fixes nothing (other than responding to some immediate news headlines). There are also probably issues on retaining the healthcare workers since there are Canadian workers in the sector moving south to US for better pay etc.
It might be unpopular to say this, but the last one i see Canada needs is people who are writing codes, which is part of the target list. This is one of most probable remote jobs. Unless their plan is to take application fees so that people move in, realise the cost of living, then move out after a couple years, i just don't understand why they need to be specially targeted because i assume a lot them will try to move US after couple years for much better pay (which is one of several jobs actually there is a huge pay difference. Most STEM jobs in US don't have crazy pay actually. they might be slightly higher, but not that high, which means it's much easier for Canada to keep these poeple). For AI workers, that might be a different story, but i'm not sure.
Another thing you haven't considered is that some of jobs require you to at least have a PR if not citizenship to be considered. One of the examples is aerospace jobs. Good luck finding a company that will give you an AE offer when you are completely foreigners for security reasons. So if you close the door even from Express Entry, good luck replacing the current employees when they get retired, especially i see some of them already doing remote in canada for US companies now.