You got a very solid point on the fact that one shouldn't be bothered if any match is fixed, but should just bet anyways and perhaps the match results turn out to favour them.
That is the true story for those who just places their bet and go to sleep or to do some other more interesting activity, only to return and see that they have won big on a bet they didn't put so much thought to.
Over thinking will surely and always do take the fun and thrill out of any risky endeavor, mostly as regards gambling or placing a bet and that's the fact.
Yes, that will be their decisions whether to still place a bet or leave the bet without thinks too much. They don't have to follows what other people who still place a bet, especially if they can't accept the reality that the match is fixed. They better leave it and not watch the match or their feeling will gets the impact of the dislike.
If that happens to us, we can used our time to do other things that's not related to gambling because that can makes them to feel enjoy with the other activities. We must search for the other activities that can gives us happiness and we will gets many things besides of using gambling to have fun. So it's not be a problem if we thinks that match is fixed because we have the other thing to release our stress.