True, but at that point they probably don't have a carrier to start with. The upfront cost is 5 billion for 5 million/week upkeep, so if you can't reliably make the upkeep in a week it'll take you 20 years to afford it in the first place (plus a bit more for the fleet to store on it)But for others 1h a week can be a sizeable junk of their weekly playtime.
For a services-heavy carrier, then maybe 7 billion upfront for 20 million/week upkeep, that's still seven years to afford the carrier if the upkeep is a significant portion of your weekly earning rate.
Obviously if you play a lot with a much higher earning rate, buy a carrier (leaving yourself cash-poor) and then significantly reduce how much time you spend in game before your reserves have built up again, it can bite at that point, which isn't ideal.
"Immersion", same as refuel/rearm/repair not being free.Another question: What's the benefit of upkeep? Some people defend it very loudly.
(I'd argue there's no point in charging for those, either)