But.... they don't. Their games are old the minute they're released. Sure they have enough bare minimum charm to wow the masses, but when you truly take a skeptical and honest eye to them compared to many other games, you realize how lazy they are with the copy/paste approach most of the time, inability to add basic common niceties of modern gaming, and generally lacking worlds that feel unfinished.
If it weren't for the IP name recognition, most of their games would be panned as meh.
It's not a formality. Continuing Resolutions (CR's) and especially shutdowns can really affect people's lives and society at large. People who require critical resources might wind up going without.
It also winds up costing the government more overall to go through this every year.
This appears to have decent information on why shutdowns are bad:
https://www.crfb.org/papers/government-shutdowns-qa-everything-you-should-know