It's very easy to suggest political moves 4 decades later.
The Cairo agreement was in many ways forced on the Christians just like Taif agreement.
4 decades or 4 centuries, it doesn't really make much difference, mistakes this caliber are mistakes this caliber. Anyone who does not understand it's a fatal mistake allowing a fully armed foreign gang of revolutionists on own turf, and with total supremacy over their areas while your own army is not, is a super mega moron on an infinite magnitude. heck their cursed signatures almost lost us a country and many hundred thousand lives, and the consequences we're still living today.
And you can't compare the so called "pressure" the maronites back then, when they still were ruling kings, to the one they later had to endure after they were so completely done.