I think the point is more that in seeking to satisfy people like you, they’ve made everyone who likes the more reliable tech SOL.
Personally I love my bt headphones, but I also liked having a wired set for backup in case my battery ran out. If I had a choice between a jack and no jack on an otherwise feature-identical phone I’d choose the jack
I’m capable of keeping my batteries charged and haven’t really run into that problem. I also appreciate having my phone be water resistant and having one last thing to go wrong like getting the port get gunked up from stuff in my pocket. 
As far as reliability goes, I suggest you try some better headphones, because I’ve never had a reliability problem either. 
I think the point is more that in seeking to satisfy people like you, they’ve made everyone who likes the more reliable tech SOL.
Personally I love my bt headphones, but I also liked having a wired set for backup in case my battery ran out. If I had a choice between a jack and no jack on an otherwise feature-identical phone I’d choose the jack
I’m capable of keeping my batteries charged and haven’t really run into that problem. I also appreciate having my phone be water resistant and having one last thing to go wrong like getting the port get gunked up from stuff in my pocket. 
As far as reliability goes, I suggest you try some better headphones, because I’ve never had a reliability problem either.