Regardless if it's a 50/50 chance of winning or not, it's still good to stick with the sports we have known.
We are also doing gambling here, therefore, expect the unexpected like an underdog might pull a win and upset the favorites. But keep in mind that it's not always the case where upset always happened. Of course, even with the support of a well-detailed analysis, it's not that it's a sure win already.
Sports betting is already tough, why add risks to consider betting on other sports that we don't know or are familiar with?
One of the main attractions of sports betting is that with the right knowledge about a particular sport and the odds you could at least decrease the house edge the casino has over you, but that possibly disappears as soon as you decide to make a bet on a sport you know nothing about.
And while there is nothing inherently wrong with such a decision, as each person can decide in which way they may like to use their money, at the same time anyone doing this may as well just play a different gambling game, as they are refusing to take advantage of the knowledge they have accumulated as fans over the years.