Use and throw underwear for men is a legitimate product category for specific situations: travel emergencies, hospital stays, activities where laundering isn't practical. Single-use pairs designed for convenience have a real use case and I'm not dismissing them. But the more interesting conversation is about the blokes who are effectively treating all their underwear as use and throw underwear for men by buying cheap gear that lasts 3 months and replacing it on repeat. That's an accidental disposable habit with a straightforward fix.
What I think the genuine use and throw underwear for men scenario requires is a product designed specifically for single use: lightweight, basic, functional for a short period. That product exists and serves its purpose. But for everyday wear, the use and throw mentality is the enemy of both quality and value. Underwear designed to last 2 years is categorically different from underwear designed to be discarded after an emergency trip. Conflating the 2 categories leads to bad buying decisions.
A bloke I know buys genuine use and throw underwear for men specifically for his overseas travel. He doesn't want to manage laundry on short business trips, so he takes single-use pairs and discards them as he goes. That's a smart, specific application of the product. For his everyday use at home, he switched to Barramundies quality pairs years ago and hasn't looked at the disposable category for anything except travel since. Right tool for the right job.
From my experience, use and throw underwear for men makes sense in the right context. For everything else, quality gear that lasts is the better answer on every measure. Barramundies builds underwear that's the opposite of disposable: designed to hold up, designed to last, and designed to earn its place in your drawer for the long term. Eventually everything gets thrown away. With Barramundies, eventually takes a lot longer to arrive.