No pools and specially no Multipools, keeps the network smaller or at least limits its growth over time, because of this the percentage of the total hashrate you represent will be significant for a longer period of time or maybe forever in the absence of pools.
Where is your evidence of this, or the logic behind your statement? How does the lack of pools limit hashrate?
If you mean that big multipools can't mine and instadump, good. Solo mining encourages longer term miners who are more likely to value their mined coins, and less likely to dump them like clockwork twice a day at whatever the bid price happens to be.
I'll happily trade the lack of multipools and their constant price supression for a few less temporary GH/s. Such multipools do nothing for blockchain security anyway, like every other pool they just reduce it.