As someone that almost exclusively uses snipers against bugs and bots alike, and plays bugs probably 90% of my time, I could not disagree more. This diligence is definitely not as punchy as the CS, but it's great for groups of chaff. The CS is amazing, and I'm consistently getting 500+ kills and out performing the rest of my 3 man team. With the way I play them, the eruptor and diligence are nearly interchangeable, and I get a ton of kills either way.
How? My loadout is a jump pack and either a commando, EAT, or quasar. My strategems are usually a 500 kg for emergencies when my AT is down and an orbital Gatling for helping manage big breaches. For reference, I only play on difficulty 8-10, depending on how casual my group is feeling on any day.
Step 1: Find bugs/objective
Step 2: Jump pack on top of a rock, or a building if one isn't available. Worst case scenario where you can't find solid high ground, use the jump pack often to reposition to a clear line of sight with plenty of time to stand and shoot.
Step 3: Use your sniper for its optimal use. Diligence? Closer range picking off hunters, scavs, and warriors. CS, the more powerful option imo, target warriors (one shot head), hunters (one shot head and body), and medium targets (hive guard and alpha commanders, both 3 shots head). This thing feels like the old breaker, but at range. It just destroys. If you're using the eruptor, shoot it into groups. Don't focus alpha commanders too much, let the shrapnel deal with them.
Step 4: Profit. Use your primary to deal with patrols before they can get close enough to breach, use your secondary revolver to kill alpha commanders and hive guards rapidly and while saving ammo, and use your anti tank to deal with any heavy threats ahead of time. Anything gets close enough to breach, drop a Gatling barrage on the breach use AT or 500 kgs to kill stray heavies.
I usually finish a mission with no deaths, and always with by far the most kills while running this loadout. Snipers cannot deal with all threats, but they're excellent at thinning out enemy groups with very high ammo efficiency.
And I'm not even mentioning bots. Against bots, all the snipers kick ASS. My CS is one shotting entire patrols of devastators from miles away, my eruptor clears patrols of all kinds easily, and the AT options are so much more consistent against bots. Bots are too easy with snipers. And definitely run the revolver for a low ammo pocket sniper that can deal with rapid hunter packs and charging alpha commander patrols alike.
TLDR: Snipers are really good, they're my main choice, and I'm out performing everyone else. If it's against bots, they're even more incredible.
Only millions of people that were simply born in the wrong place. Only a world superpower potentially turning into an autocratic regime in support of other tyrants.
But sure, other than the existential threat of the largest exporter of culture and most powerful military on earth in a country that has a history of imperialism and warmongering falling under the control of an autocratic regime of fascists, sure. Nothing of value.