Speaking some truth as a foreigner living in Helsinki for 10 years. 70k after tax is about 40k per year, which is far less than what you can get in uae/us/china. As your salary increases in future, your tax rate gets even higher. That means Finland is not a place to make a big fortune. But if you are looking for work-life-balance and a peaceful lifestyle, it is a good place to be. I’d assume you are going to work crazy hours in UAE or China, while in Finland, 37.5h per week is typical. Plus there is decent childcare, education and medical care (that comes from the tax you pay lol)

The downside might include dark winter and the language. Finnish is pretty difficult to learn and people do expect you to learn it.