Because I think it has that potential and could do it. Why wouldn´t Nintendo want Switch to be the best selling console in Finland or in other nordic countries, Sweden, Norway...
By conquer I meant that it should conquer the number one spot in console sales. Its not war, but its a battle for sales, who gets who to buy their product.
I'm not saying that Nintendo shouldn't want it, but I'm saying that it shouldn't be that important to you, as you're probably able to enjoy all the games and content as it is.