Obviously, but on the other hand they will have more experience and probably better leadership. Assuming the reduced expectations of an older player are factored into his salary value, it means you can balance the rest of the squad with younger players.
And is 30 really that old? Kaufusi and Sims both played Origin at age 30 in recent years, plus a whole bunch of halves and hookers. Yes forwards are generally past their peak, but if their peak was high (as in the case of our older forwards) then they will still be at least solid first graders at 31 or 32. Plus they will have all this experience and leadership. It will be a good pack for integrating youngsters... Betham-Misa, Brazel and Muagatutia could become first graders, and there are some absolute stars in the SG Ball pack (though they shat themselves this weekend). And Mataele will still be here in 2025. He looks like he's almost ready for first grade.