Neither Bell or Boeing can be considered mostly military companies, as each has a significant civilian market. If the definition is a company that produces any military vehicles, then a lot of others fit the bill, meaning that Lego shouldn't realistically have licensed anything. Without a specific a criteria anything in between can be argued, which is an exercise in futility and a very superficial point to make.
What I specifically have a problem with is that this NGO is trying to push forward connotations that this particular version of the craft somehow participates in the taking of lives due to being used by military. While it may technically violate a very specific written point in some document, it doesn't stand against Lego's core values, as it is specifically designed to save lives during those troubled times of war we all abhor.
The other issue is Lego's response and their identity troubles as they're trying to push hard into the AFOL market. This set also appears to be part of that trend so Lego either needs to own it or forego the market altogether. AFOLs in general are more interested in realism rather than play features and stud shooters. The Technic line in particular is what a lot of older fans naturally gravitate to because of that. In fact, the specific rule is extremely superficial when they have no qualms in representing all forms of violence (being fantasy doesn't make it less violent), but designates a rescue aircraft off-limits. I doubt they would cancel their lucrative Marvel/DC heroes deals if this was pointed out.
The other concern is stifling diversity - large Technic aircraft are far and few in-between with the last one being 42066 back in 2017, which has a much more military look than 42113. In fact there are very few possibilities as other than airliners, which are unfeasible in Technic, practically any other aircraft type has some military version/use. Should we relegate the theme to a variety of trucks and cars each year, with the odd motorcycle here or there ?
Yes, I am biased towards this set because I want it, it's been a long time since 42066, and it is potentially more interesting than a majority of sets in the line, even previous planes/helicopters. Maybe I would have defended it even if it was an attack version, but Lego already put their best effort into distancing the design from it's military use. What more can they do in order to be allowed to put forth an interesting aircraft set once in a blue moon. The argument that it's "just a toy" actually works both ways, because nobody in their right mind would consider that owning a toy is somehow showing support for war.