You're making a lot of assumptions, including that the only difference between SMRs and older generation reactors is size. SMRs are also much simpler, with the express purpose of reducing operational costs. Maybe the operational costs would be higher, but we aren't going to know that without more robust analysis or--heaven forbid--trying out SMRs.
They will be a bigger part of the costs compared to current reactors. Which is normal because employment costs are high. It's a popular choice now because all the latest reactors in the west have huge budget overruns.
