Well my experience is that most offshore pilots have very limited SPVFR time. This is not going to change. So whether you are right or wrong, or (more likely) comparing apples with oranges, you are swimming against the tide and not being realistic. Let's say that the major operators did decide to agree with you and require all offshore pilots to have 1000s of SP hours before getting command, just exactly where are these people going to come from and even if they could be magicked up where is the evidence that, overall, they will be more competent in an airline-type offshore role?
It's all academic because it ain't going to happen. Thank heavens.