I also don't agree with this, women can't "hold" liquid in the vagina, that's like saying "why don't women hold in their period". The muscles of the vagina cannot clench tightly enough to prevent liquid escaping.

I've seen amateur porn videos (look up a creator called devoutdevour) where the woman squirts and it's quite a lot of liquid, and it's multiple times in a row, no cuts, no cinematics, just a man giving his lover a lot of clitoral stimulation both internally and externally. I do not think it's possible for this to be "her holding water in the vagina then releasing for cinematic effect", especially if it occurs while she's being fisted and her clitoris rubbed at the same time. If anything it's coming from the urethra not the vagina.