I think those are two different things. They might do 1000s of secret break-ins per year, maybe 10,000's. But probably not millions. OTOH, mass surveillance is used against just about everyone, i.e. billions. So the scale is different.
Here in the US, I suspect secret break-ins are rare, because they are risky (armed occupants etc). So they do SWAT raids instead. Abusive and too often fatal, but not that secret.