Note - I immigrated to Ireland from the US and went through the visa process (including huddling in the cold in January at 4 AM at burgh quay, and years later, writing a scraper for their insanely bad appointment system that managed to actually be worse than huddling in the cold)
It's pretty normal not to be able to look for work on a tourist visa in most countries - are you suggesting this is unusual? As far as spouses, they used to have an incredibly asinine system where they told you your spouse _could_ work, without sponsorship, if they got a special form, but getting this form was de facto impossible. It was a very Irish approach, in retrospect. The campaign to fix this was, eventually, successful. (https://reformstamp3.wixsite.com/home)
Fwiw I’ve seen confused or misleading posters reply to this change with statements along the lines of ‘this only means that they don’t allow tourist to apply for greencards in the country’.
Which is nonsense, it applies to all non immigrant visas such as work visas. But it’s a line you’ll see various people try to claim as if this isn’t devastating to every spouse of a us citizen who now can’t get a greencard without leaving their us based job and family.