Why does increasing Kaspa's block rate reduce security in a traditional blockchain?

In a traditional blockchain, speeding up block production forces more blocks to be thrown away (orphaned), which quietly weakens the network's defenses. A blockchain is considered secure when an attacker would need to control more than 50% of the network's mining power to rewrite history — but orphaned blocks effectively lower that threshold. When blocks are produced faster or made larger, more of them collide in transit and get discarded before the rest of the network sees them; that wasted work shrinks the share of 'effective' honest mining power, making an attack easier to pull off. For a beginner, the key point is that this orphan-rate problem is precisely what Kaspa's GHOSTDAG protocol was designed to escape — by keeping parallel blocks instead of discarding them, Kaspa can scale throughput without quietly handing attackers an easier target.