I agree. There are way too many denominations all divided on relatively minor differences.
As far as Catholicism being black and white, I can understand how it can simplify things. However, things aren't always black and white. There's a principle running throughout the New Testament: Each person has the liberty to decide for him or herself; it's between them and God, as the Spirit leads.
"Each one must give as he has decided in his heart, not reluctantly or under compulsion, for God loves a cheerful giver."—2 Corinthians 9:7
"One person esteems one day as better than another, while another esteems all days alike. Each one should be fully convinced in his own mind."—Romans 14:15
"Therefore, my beloved, as you have always obeyed, so now, not only as in my presence but much more in my absence, work out your own salvation with fear and trembling."—Philippians 2:12
These are few examples of scriptures that illustrate what I'm talking about.
Not everyone's alike. Unfortunately, Protestant denominations have decided that anyone who doesn't agree with their particular interpretation must be disfellowshipped. Catholicism on the other hand is basically just another Christian sect that says you must fall in line with us.