1) Not all disasters can be evacuated away from. Tornadoes, for example.
2) So do power poles. And those telephone poles are also probably carrying data.
3) You can't dial 911 via email.
Cell network congestion is a well known phenomenon when disasters strike. It's been seen multiple times in the past. Yes, landlines can and do fail as well, but they're more resilient than cellphone networks.
Perhaps this will flip in the future, but it hasn't, not yet.
2) Yes, power goes out too. Cellphones have batteries.
3) Yes, you can dial 911 via "wifi calling". I've done it.
I don't know about "hate" but I do think landlines are overrated. You already have a cellphone. Paying for an extra service and apparatus for the tiny possibility that you need to call 911 when your cellphone can't - why? Who else are you going to call? Do you even know their phone numbers without your cellphone?
I also think you're undervaluing cellphones by assuming they only talk on the cellular network. You just need to get on a data network somewhere and you suddenly have a wide variety of communication options, including phone calls. TCP/IP was designed to withstand nuclear war.
1) In the event of a major disaster, you've probably evacuated. You can't take your landline with you.
2) Telephone poles burn.
3) Even if the cellular system is completely hosed, you might still be able to get on a data network. All you need is crappy wifi anywhere (cafe, hotel, friend) and you can get an email out.