Well then I guess you've heard it all and need to stick your hand into the boiling water to figure out it's hot. Good luck with that.
Learning to fly and gaining certificates and ratings can be expensive. There are many paths toward this--both civil and military--and each have their advantages and disadvantages. In general, it's better if you can get someone ELSE to pay for these and even better if they are paying you something for your efforts as well. If you DON'T have the certificates, ratings, and flying hours this may be one way to obtain the basic ratings. IMHO if you stay beyond this you are making a grave career error. It also can be a fun job if you enjoy traveling and seeing different places around the world. In general, you're reasonably well taken care of on the road and can go to some pretty cool places and meet some decent people.
Some people pay for sim time; you can look on it as 'free' sim experience and some training exposure into airline ops and large aircraft. If you're interested in flying--really flying--you won't get much if any of that here and will spend most of your time pushing buttons (or watching someone push buttons) managing an autopilot watching air go by (while verbalizing scripted callouts which remind me of a tennis match). Almost any regional would be better for obtaining more hands on experience and proficiency in actually flying. The role is to get people safely and cheaply from point A to point B on time if possible using all the tools you have. Boring is good for the mission; exciting tends to spook pax. You can gain some experience in international ops and weather avoidance, fuel management, the multitude of rules, multi crew flying in an EXTREMELY regimented and SOP oriented environment (which also has its advantages and drawbacks), CRM, etc. So there might be value in this. But most of the flights will be long haul (where you can learn some stuff about oceanic and international polar ops, etc.) -- again watching air go by and trying to stay awake.
If, as you say, your interest is genuinely in aviation (or at least a passion for the flying portion) IMHO this isn't the place for you. Other than maybe learning how airline ops work. Very paint by the numbers and there isn't room for individuality or much creativity (or actual hands on).
As a career, IMHO forget it. If there was ever any doubt, POS 18 put the nail in that coffin (IMHO it's simply a bastardized hourly contract without any of the rigs, pay protection, benefits, protections, bidding and trade system, two way rostering, or good things--including incentives and win-wins-- that exist in a 'real' hourly airline contract).
So, to me the bottom line is if you have NO OTHER viable method to obtain certificates and ratings this could be a potential option (and give you some exposure to flying and airline ops). The trainers themselves in my experience have (at least over the latter years) been pretty good and do care (again there are personalities and the standard one off kinds of things which happen). But there remains a great deal of 'here's the book, figure it out" types of things.
The one thing you have to watch out for is getting suckered in (ala the "Las Vegas" syndrome) believing things might get better or letting the place steal too much of your time.