> Tourism is a terrible industry that doesn't even contribute that much to our economy
Portugal is heavily dependent on tourism: it's 10% of the GDP. In the EU not even France is that high: Spain is higher but Portugal's economy definitely depends on tourism.
When stats says: "10% is tourism, 40% is services", if you remove the 10% linked to tourism, the services economy does crash too. And so does the 20% that is "construction": a part of that is second effects from tourism.
You can't just say: "We'll just remove 10% of our GDP and we'll be fine". Firstly even at "only" 10% you'd be totally screwed and then anyway the actual number would be much higher.