I hit my wife's cervix at most angles, so I have to be very careful. I'd gladly give up some length so I could enjoy burying myself in her. It's difficult to stop just shy of her cervix while still enjoying myself. It keeps me from getting lost in the moment. Thankfully my girth is average so we don't always have to use lube. I also don't split her in half like you described. I think most guys who think they're small are actually perfectly sized for most women. But just like some men have big dicks, some women have big vaginas. Same with small dicks and small vaginas. I think people should just be happy with what they have and try to find someone they fit well with.