Wonders Years toured here about 3 or 4 times before The Upsides came out.
I Call Fives toured here with only one EP.
I could go on but the point is loads of bands do it, but if the band can't do the tour, don't book it. Simple as.
You know nothing about the situation. Have you ever tried booking a tour? How about a tour in a foreign country? Tours are booked months in advance and circumstances can unfortunately change. If it was a possibility for them to come over, they would have.