It’s not always a shot
It’s called a flu “shot,” but it doesn’t have to be an actual shot. Your choice depends on your age and other factors, like allergies and pregnancy. The two main options are the shot and the nasal spray, with the former being OK for a broad age range and for pregnant women, and safer for people with asthma. Meanwhile, the nasal spray is suitable for a more restricted population, plus it may cause a few more side effects. The spray is also less widely available, and tends to cost a couple bucks more. The other good one to be aware of is the recombinant shot, which is for those unfortunate individuals who are allergic to eggs.
It IS easy and cheap/free
To get a flu shot, you don’t really need free time, appointments, doctors, or insurance (but those are good, too). Heck, you barely even need money. You can walk into a pharmacy or health center whenever you feel so inspired, and bam, flu shot on the spot. There’s even a map that tells you how much it will cost to Uber it to the nearest flu shot source, which, if you’re feeling like you live in a dystopian futuristic world, is evidence of that. But it’s also convenient!