Why in the world would somebody take a cheap knife to use as a beater?
Its cheap, cheaply made out of garbage, and just can't handle it.
Define cheap.
I for one turn to my $50 kizlyar supreme Ute as my go to "beater"... While I also have more expensive knives that I'm sure could handle the tasks, I don't intentially turn to them first if I know in advance that a task is going to require a knife to take an extra "beating"; I also don't consider $50 cheap, nor do I think for one second it is made of "garbage", and this far has held up to every task ive thrown at it.
I also have some $20 "cheap" knives: I keep a S&W in my car as a spare, because I don't care near as much if someone were to break into my car and steal it. I have a crkt I like to carry with me into the woods behind my house whenever I'm clearing brush or what not, coupled with a fixed blade for "beating", it serves it's purpose for cutting and carving, and Lord knows if God forbid I dropped a knife unbeknownst in the woods behind my house, if it were a $200-500 knife, I'd be hurting and lose hours of my life searching for it, whereas if I lose a $20 CRKT free range, then so be it, I'll just buy a new one. And again, it has yet to fail me, and I'd hardly say it's "garbage" just because it's not engarved Ti and m390, or cpm whatever. My kershaws and bucks, not garbage either.
The list goes on, but, it's my prerogative. I do still carry my more expensive knives, and I use them as situations arise. I typically don't "abuse" my knives, I cut with them, even my beaters, I just opt to save my investments *(and edges) on higher end purchases whenever the risk for abuse and high grime is high. Not to say I wouldn't in an instant use my higher end knives in an instant in a "hard use" situation if one were to arise while I was carrying one of them, but I don't go out of my way to do so. Sure the higher end knives are still tools, and capable, but, I'm far from rich, and while I do like nice things, why take unnecessary risks?
I don't knock anyone who chooses (or can afford to) use a Thornburn for the dirtiest and toughest of jobs, so why is it an issue if someone else opts to use a $20-50 knife that's capable of the same task, (Just needs sharpened sooner and more frequently) while keeping their Thornburn shiny for nights out with the Mrs.?