That's my thought as well.
Bethesda's going to make it so mods will "run" on the game, the infrastructure will be there - presumably a marketplace to find mods and options to select which downloaded mods to load. But that's historically been about it, as far as developer support goes for mods. They give us the tools, but if modders do things out of the box, the onus isn't really on the companies to provide further support. That's not even meant to be a diss on any of the companies - that's just how modding works.
Things like script extenders came out of the modding community (sometimes before the official creation tools were even released.) Bethesda has never in the past worried much about whether or not patches would break a mod or a script extension version - it's usually up to the modders to catch up with what Bethesda patches into the game and not the other way around. That's how it's always worked as far as PC has been concerned - it's not that Bethesda has done things in a certain way so that script extenders and other 3rd-party programs are compatible with their modding tools or the executable of the game, it's just by virtue of a PC being a PC that such things can happen. If script extenders and 3rd-party programs aren't compatible with consoles out of the box (and really that comes down to whatever modders create and whether they can find out a way to make them run on consoles) then I don't see either of these companies bending over backwards to make it work.