There's probably a middle way that you and your DP can find :)
It doesn't sound like your DD has the same reaction to spice / chili as my DS. I'd never force him to eat hot spices as he's extraordinarily sensitive to chilli and heat. It actually hurts him, it seems to burn his mouth and he not only screams in agony if anything like that gets in his mouth, he also gets very panicked too as the heat lingers. Utterly awful for him and he'd never be able to eat half then say it was too spicy, he'd be in agony as soon as the first sensation of chilli bloomed in mouth or lips.
So if you fed DS chilli and forced him to eat it, it would be extremely cruel, verging on abusive actually such is the level of pain. But if you feed your DD chilli and forced her to have a good stab at it before leaving the table... Not so much!
I think I'd just say, be careful not to push her too far into 'finish your plate' territory as it can over ride her ability to tell when she's full. Given the comparative abundance of food, especially the more unhealthy / 'empty' foods, and obesity etc, it's more important to teach eating skills in a way that wasn't relevant when food was a more precious resource.
So being in touch with her body feedback, and understanding what it means eg when she's full, satiated, and when she's thirsty rather than hungry etc.
I'm doing some gentle work with DS (5yrs) on the difference between 'I don't like it' and, 'I'm more in the mood for x', 'I've finished eating thank you' or 'I'm not so keen on x at the moment'.
DS tends to say 'I don't like it' as a blanket term for anything, often when he's eaten most of something! It has the side effect of convincing himself that he actually doesn't like something so not a habit I wish to continue!
My last thought was that although I grew up in a very poor household, eating what you're given didn't have the desired effect. I disliked many of the meals my mother cooked, really really disliked some of the core ingredients, textures and sensory stuff not just taste buds.
Meal times were hideous, sitting there for hours as we weren't allowed to leave the table until we'd forced the congealed revolting stuff down. I used to vomit so much (not on purpose, retching from eating something my body rejected, plus the anxiety) so my mother stopped me from being excused from the table to go to the toilet, and I'd be sitting there trying to swallow my own vomit so I didn't get yelled at for being sick.
I used to protect my sister by taking her uneaten food into my plate as she would have been sitting there til past midnight if not.
So by the time we left home I was 5ft 11 and 6.5 stone, and my darling sister was 5 ft 6 and 5 stone. Bulimic me, anorexic her. Now I binge eat and am fat.
I don't think that's what will happen in your house, but just a warning that the 'eat what you're given' doesn't end up with healthy attitudes to food, and good table manners.
Btw I have great table manners now but not due to my childhood.