Who said anything about a yo-deba?I was thinking a workhorse Gyuto, not a Yo-Deba or similar double-sided knife, would cut versus split a hard squash or similar.
A thin lightweight laser of a knife seems counter-intuitive to me as I would think the edge could be damaged and a lot of force on the thin profile would be likely to cause other problems.
That being said, I have gotten tired of a German Chef's knife smashing hard veg and cracking it on occasion. I really want to cut hard veg and not pound it with a clubby wedge.
Thin knives work very well on hard, dense product as long as you don’t twist or torque the knife, avoid any hard roots/stems, etc.
You mentioned wanting a workhorse that can cut carrots, sweet potato, squash, etc without wedging. More “workhorse” type gyutos I can think of off the top of my head that can cut dense foods well tend to be $300+ though and you mentioned you were looking for something in the $200-250 range. You can consider a middleweight like a Shigeki Tanaka or a maybe a well priced Yoshikane that has a bit of a stiffer spine and a little more weight than a laser like the Ikazuchi, but will still cut dense foods well.
All I’m saying is don’t buy a Heiji or Gihei and expect them to be drastically less wedgy or to crack less in tall, hard food than a German chefs knife.