I suppose people just want to have tidy schemes to believe in. A similar fascination I've never understood is why everything should be connected (you know, like, Rasmussen was Archer's Roommate, V'ger and the Borg are connected in some way, Q and Trelane are related somehow, and so on).
Yeah Trek fandom has that history of wanting everything to be a small universe.
There are sometimes when I can agree, sometimes not. I *DO* think Rasmussen should have had some kind of connection to NX-01, just given that all the time travel shenanigan's happening in ENT and given he was from the 22nd century. Through ENT's whole run I was hoping for a sort of prequel to that episode, showing how Rasmussen obtained the ship in the first place.
But yeah, all of the things all of the time don't need to be related, and it's also ok for there to be some stretches of time where there aren't certain things. It's ok for there to not be a ship named Enterprise for awhile.
In my mind, the Daedalus class, while very capable, was very much a "cookie cutter" type of ship. Mass produced to help fill out Starfleets numbers, especially after having just fought a war with the Romulans.
This is what I use for my Daedalus history.
I like to think the Daedalus actually did enter service during the Romulan War, as an Earth design. I have it actually closer to mass produced garbage, a ship that easy to slap together and get out into the war, to the point that the design was outsourced to the other Coalition members who slapped together whatever they had. It led the Daedalus' being not super uniform... it was a cheap spaceframe that could accept any number of components, so they were something of a frankenstein fleet which became the prototype for how Federation Starfleet ships worked... with production being all over the place during the war, the Vulcans may have churned a few out with Vulcan warp drives and tractor beams, while they got a shipment of weapons from Earth and just integrated those, with some Andorian shields they pulled from disabled Andorian vessels.
They don't last too long after the war because they were made to be almost disposable.