Earlier quoted context omitted.
He didn't design it to exploit later adopters, he designed it so that the output was consistent regardless of the network size.
Completely wrong. The output is actually completely inverse. More work, more users, less output. The consistency you're thinking of is likely the algorithm that adjusts blocktime to 10 minute intervals.
Penalising late adopters is just the reverse of rewarding early adopters and bitcoin needed early adopters to keep the network alive so it makes sense to reward them. I dont really buy that late adopters are being penalised though.