I consider it bad faith, because it's a few months in the year which suck either way. Yes, having the sun rise at 2am is bad. But is 3am a noticeable difference? Or alternatively is it really that much better or worse to have the sun set at 11pm instead of 10pm?
It is much more honest to talk about the timings around equinox, because there we have 12h days and when to get up in relation to daily life (mostly in relation to when work starts) is a much more relevant question then.

Someone else also mentioned the "wrong time zone" problem. Yes that is true. I believe the current state was preferred, because it makes interaction with France and Germany easier. Changing the time zone would be a reasonable improvement as well,at the cost of a bit more complexity in trading and daily international cooperation.

(Not sure what you mean with the "subtle difference", maybe it was to subtle for me. I would disagree with the "Spain should not be counted", because they are obviously affected. But yes, changing time zones would be a valid solution to the sunrise/sunset problem and I do not consider that line of reasoning to be in bad faith because it is a valid solution to the problem with its own tradeoffs that can be discussed.)