This is a great list. A couple to add:
Necromunda is an FPS which plays like Titanfall 2 in 40k, so excellent moment to moment gameplay, some really cool levels and set pieces highly recommended.
The proper old school Fire Warrior which is an FPS I played probably 15 years ago no idea if it holds up today.
If you have VR Battle Sister was pretty fun nothing special but holding and using a bolt gun up close was awesome.
The Kurzgesagt video about this is really, definitely worth a watch.
My guess is detail and economy of scale. Airsoft guns commonly use the design of a really world gun either licensed or legally distanced so can be very close to reality in looks. Airsoft is also quite a popular hobby so many manufacturers are involved. You are also looking at an M4 variant which is the single most popular Airsoft gun in the world. There are literally hundreds of variants running from cheap manual springs to high pressure air tanks and costing thousands. Prop guns are more niche, they are detail orientated and don’t need to function the same way. Maybe they make a pop and eject a case from the side of the gun which is more complex to do mechanically than send a little plastic bb out the barrel. There are less people buying each type of prop gun though so it will cost comparably more per item even if it technically doesn’t do as much.
Does it get better? I watched the first 1 or two episodes but stopped because the first real decision the young black female hero makes for herself is to join up with a gang of criminals which felt really problematic to me.
I mean this feels like it should be illegal. Another reason to not buy Ubisoft games I guess.
On a larger scale yes very much so. It’s mushroom zombies which gives them some cool variants and interesting ways to have threat rather than just the shambling hoard.
On a small scale is about a journey made cross country in the apocalypse by two people and their relationship.
I’d recommend both the games, though the first is better, and the TV series as very enjoyable and worthwhile.