because with majority youre forcing people to join wagons. with cfd, you can get a bunch of wagons that are less than majority and see where votes are landing towards the end of the day and based on that you can see, especially later on, if people were shifting away from a player that ended up as scum to go after town, etc. it provides a lot more useful information, in majority lynch you'll just be pressuring people to force a lynch then look at the wagon and ask why they voted and they'll say to achieve a lynch and it's a mess.
you gotta trust me on this because i've seen it enough lol. i'm not saying never pressure people to achieve the lynch, but cfding on day 1 with majority will give less optimal results.