I personally would rather spend my money (and these things aren't cheap) on products that would survive such a mistake (MY mistake) and/or on products which can be fixed when you make a mistake. Thus sharing this information. If you're good with spending your money this way, then by all means do so--that's your choice.
That's a tough break and I get it - you spend $500 on something intended for outdoors and you do kind of expect it to be able to take a little abuse.
The reality, of course, is that these "portable power packs" are intended for soccer moms and weekend campers at the lake.
EDITED TO ADD: Reading your post, I can see that you aren't so much upset that it broke, but rather that the manufacturer offers no way to repair a relatively minor problem, and I have to say, that is also my biggest gripe with these enclosed "all in one" power solutions.
One of the reasons I decided to build my own (besides the fact that I'm a cheap ******) is that if any one component failed, I could swap it out myself.
Unfortunately, it's a bit of a "race to the bottom" in terms of quality. Li-I batteries are expensive so the only way to keep costs down is to cut corners everywhere else.
Again, being a cheap SOB I went with a simple FLA battery for my setup. It's an 80lbs boat anchor but it seems to work "well enough" (though I started a separate thread on some issues I've been having recently, which have more to do with my skills or lack thereof though.)
I wish I could say someone will build a "rugged" power pack eventually but the reality is that the money is in cheap, mass produced Chinese crap.
If you have to spend a lot of $$ you could consider something like the Ark-Pak where you bring your own battery.