The first 3 are hard to defend, but the last 2 ones can at least be debated. 5 star dinner provides 178 health and 2 strength with a simple dinner, produced without crafting out of plentiful and/or very cheap stuff. That is the equivalent to a large health potion and a medium strength potion combined. It would be worthwile considering IF health potions would not be available in abundant quantities (I mostly SELL them after Cyseal).
And walk it off depends very much on play style, it can be worth a ton of gold for a glass cannon character at character level 7 in magic enemy crossfire e.g. But as soon as you learn crowd control I agree - it is basically worthless.
Regards,
Thorsten