Nobody really "knows" what is going to happen, there is no reason why we should argue about any of this, we are just speculating, just like crypto prices. We can guess that Real Madrid will win because they are the better team and that should be clear enough to make them favourites and have them be wagered a lot more than Arsenal or even a tie. But that doesn't guarantee their win, so people who say Real Madrid will not win are also right as well, because there is a chance that might be true too.
So do not argue with each other on this, you could see this being a very true deal or a very wrong one, you have no idea which one will happen, so no reason to have heated arguments over it. Just bet whatever you personally feel like it.
surely no one will know about the results of the match between Real Madrid vs Arsenal and surely because of this people discuss and exchange opinions, but yes it is true that in that match more people favor Real Madrid in that match than Arsenal and indeed it makes sense because Real Madrid is a club that has experience winning in the Champions League and of course if your choice is Real Madrid in betting of course it is a very wise decision and of course in my opinion your prediction will be correct.
but it is true that we can bet as we please wherever because indeed in a football match of course there are always surprises and of course in this case it can also depend on luck because of course with luck whatever we choose always ends with profit.
if you look on Google of course the one with the greatest potential to win is Arsenal but because I have a feeling that Real Madrid will win so I will try to bet to favor Real Madrid just like you. yes hopefully we are lucky when betting later.