I will admit that Seasonal currently is not in a very great place, but to say it’s a joke is really a matter of perspective/opinion. Idk, I guess some people actually enjoy grouping up to do Realmwalkers. Don’t know if the Seething Realms portals require a party or not, tbh…
I guess Seasonal is now 
(Cooked, for those who don’t know why I’m using the emote). I’d like some Cajun spice on my D4, plz! 
Your spelling error aside, I would argue there’s a right for people to choose one over the other. Some like Seasonal, and some really don’t like it tbh. Yeah, you do have your own reasons, but it’s likely not right to say that you shouldn’t choose one over the other. I do get your last point.
This holds true for many, yet no-one is really telling you when to make a new character–you might have to each new Season, but I don’t see anyone holding a gun to your head saying you must.
Maxing out characters is also pure preference. Some people really don’t care much for messing with that, in all honesty. Me being one of them, yet I won’t bash or disparage anyone for liking that kind of thing.