Of course two people can live together in peace (most of the time). There will be disagreements with anyone you live with from time to time but "Don't sweat the small stuff".
The goal is to find someone who shares your same values, wants the same things for the relationship that you do, naturally agrees with you on how to obtain those things, and last but not least have a mutual depth of love and desire for one another.
Compatibility trumps compromise.
Like attracts like and opposites attract divorce attorneys!
With regard to celebrity divorces it's been reported that overall divorce filings are (initiated by women) 66% or 2/3rds of the time. Some have speculated it's due in part to better career opportunities and higher pay for women today versus those of women in the 1960s and prior generations where women often relied on their husbands financially.
The more options one has the less crap they will put up with!
Now imagine two rich celebrities getting married and they run into a rough patch. Both are financially in a position where a divorce would not change their standard of living and if they're attractive and popular they're keenly aware there are lots of people who would want to date them or marry them.
Therefore if they experience a period of "unhappiness" in their marriage it would be harder for them to justify staying with someone if they're "not feeling the love" any longer.
Another reason why many celebrities have multiple divorces is like many in the general public who got married the (first time) did so very young or to people who weren't prepared to deal with the pressures that comes with fame and success.
A lot of those (first time marriages) took place while they were in their 20s or just as their stardom was starting breakout. Growing pains and major changes can be stressful.
Lastly each of us has our own "deal breakers" and boundaries.
If for example cheating is on one's "deal breaker" list and they discover their spouse cheated on them and decide to opt to file for divorce; should it reflect negatively on them?
Another example may be verbal/physical abuse or the discovery of criminal behavior or alcohol/drug addition.
Essentially the only to save those marriages is for someone to not have any "deal breakers" or "boundaries" which basically means they don't love them self or have little self-esteem.
Ultimately a divorce is a public admission that a "mistake" was made in someone's (mate selection process).
Human beings make mistakes in all areas of life and choosing a spouse is no exception!