That example actually underlines parents point. Because, yes, delivered food is convenient. However, at least in my experience, delivered food from a professional chef is always inferior to what I'd get if I actually visited the same restaurant. Yes, packaging has improved and fried stuff isn't as gross at it used to be, but it is still not the same level of quality compared to actually going there.

Yeah, if you break it down further into the set of all possible options, but it depends what my criteria/realistic choices are. If I'm not going to or can't leave my house, then the more convenient option is still the better one.

My exception was to the terms "always" and "in every way".

But within the same example its not as good as if you ate the exact same meal freshly served - things won't be as hot and certain textures will be lost in delivery (eg crispy things going soggy)

You mentioned a chef which is less specific but I generally consider restaurant food less healthy than what I'd cook for myself due to differing incentives which is another dimension for convenience

Indeed, but that's a different choice than the original. If leaving my house isn't an option for me, the subsequent options entailed are then off the table, so to speak. The OP said "always" and "in every way", and I was pointing out that there are many exceptions, depending on many factors.