How scary are arranged marriages?

My cousin is getting married in a week, she met a guy along with our family , and the next week the guy’s family came , chain poraise and biye thik kore chole gese ,everything is being so rushed , and my cousin is someone who never had any type of romantic relationship in the past (mainly because she was never allowed to , plus she’s an only child so she always used to be scared of dissapointing her parents)

she feels very scared as this is very rushed but idk why she agreed to all of this , i think it’s because she’s always had this mentality “biye kora lagbe , abbu ammu bolse , boyosh hoise tai korte hobe “

but im really scared, we wouldn’t be able to get to know the new dulabhai that well too, cuz he’s going to go study abroad in 2 weeks ,so we wont be able to spend that time w him , neither will my cousin

also this makes me scared too about arranged marriages , are these really that bad?