Guard Herc dude here, just read this threat pretty much in disbelief. I knew it was bad, but I didn't know the day of the WO was so far gone. I couldn't imagine a re-up after that kinda stuff.
Not so fast... What you're hearing is a valid viewpoint but a very myopic one. A warrant in a company in a battalion in a brigade in a division... They all have their differences.
Also, after 21 years of service, I often wonder when exactly "the day of WO" actually occurred.
All manor of line pilots - AF RLOs to Army WOs often complain about those feared "additional duties." It was alluded to early, but bears repeating, these additional duties, for the most part, are incredibly easy. They usually have a singular focus, follow checklists, and are the absolutely only other thing a WO does.
Long days are not (usually) because the job takes that long. Usually poor leadership keeps guys late for no particular reason when it happens. And it always doesn't happen. And PT? Yeah, I guess you could count that... But then again, you are getting paid to exercise. And you did join the Army... Known for getting up early to exercise.
Here's the reality for a new Army warrant. Expect to fly 2-4 hours a week, depending on unit. Expect eventually to get an additional duty. That duty is what you make it and it really isn't that bad. UMO is the exception... It is that bad, but is limited to deployments. Gain some perspective by looking around at what everyone else is actually doing and realize you get paid pretty well for doing very little. Enjoy that.
You will have ALOT of downtime at first. Use that time to get the book-learning part of being a "subject matter expert" down pat. Dig into those senior PCs and IPs for knowledge. Don't be one of those warrants who gets outshined by the RLOs (all to common these days). Not flying enough is no excuse to not know your 5&9, systems, gunnery knowledge, etc.
And realize the flying gets better. Once you are a PC, YOU will Fly more. Once you are a flight lead, you will fly more. Once you are a unit trainer you will fly more. Once you are an air mission commander, you will fly more.