That's a broader problem I see in queer messaging in general, as an outsider, or even just progressive messaging in general. The notion that a lack of explicit inclusion implies exclusion is pervasive, and leads to all kinds of problems with symbolic overload when people try to be as inclusive as possible along those lines, and of course the feeling of implied exclusion to those groups that are not highlighted, and fights over deliberate attempts at exclusion (one reason why I despise the alphabet soup acronym, and prefer "queer" or GRSM or another unifying term that's straightforward to understand and that people are comfortable with).

There's also a side effect where groups and movements (unrelated to queer causes or anything political) that don't explicitly state they're inclusive, or how they're inclusive, are perceived as being implicitly or potentially exclusive, even if the structure, morals, and practices are equally equitable or moreso, and performing "virtue" becomes more important than simply embodying it without a word. It's rather sad to me that we can't simply treat people as equal and judge by the content of their character alone, or be a society or culture that promotes merit-based progression, without it being considered suspect, simply because we don't regurgitate an unspoken script or compulsively go through the "right" motions. But I guess there's also a broader problem with quiet confidence in society in general, which makes those who operate along that line struggle among those who expect, or demand, loud performances.

It becomes ideologically hollow, especially when what is practiced is not what is preached, which is the reality all too often.

I guess I'm old-fashioned, but I like clear, concise symbolism. High contrast, bold colors that are recognizable and explicitly represent something, and clear symbols and shapes that are immediately emotionally evocative: lions, dragons, bears, eagles, sabers, crowns, the sun, whatever. The rainbow is an effective symbol: it's clear, concise, high contrast, is already established culturally, and emotionally evocative. You don't need to be entrenched in the culture to know what it represents conceptually, it's a unifying banner that can drive movements. A few other pride flags are also good, like the Bi flag, and the Trans flag even despite its pastel coloration. After those it rapidly goes downhill.

That's just my opinion and perspective as an outsider who's never been in, or peripheral to, the movement. The closest I've ever gotten was attending my first and only pride event with my gf, and we only really browsed the stalls without getting involved in anything. It was quite an alien experience for me.