What's with the Hyung Bottom trend?

Is it just me or is like 90% of BL pairing nowadays usually consists of older bottom x younger top? I really can't complain, I have favorite pairings that belong in this category, my only insignificant issue is it (sometimes) generate overly puppy-semes which can get pretty boring for me. I also understand that it's like retaliation to the former yaoi trend of the reverse coupling where it's the top who is older and has more power.

But really, it's starting to feel like the big-tit uke trend 2.0 wherein the authors are really just in it to emphasize the uke as replacements for the female readers, by that I mean, since the market for these works are usually women who are nearing their middle age, or maybe the author themself is one, they might've leaned more into this for relatability?

Again, nothing against this, I just like getting insights on trends. For instance that big-tit uke trend can be correlated to the body positivity movement at the time + that ahegao meme where busty hentai characters were subtly incorporated to jokes, so the marketing for publishing those works were effective for a while but not really for long. And yes, there are still beefy ukes nowadays but rarely do I see one with pecs that can be mistaken for milking tatas lol.

I genuinely like that more BL pairings are older, god knows how rampant ageism is in queer communities irl, so to create stories that treat this development as normal and beautiful is good in my books, I'm just wondering why the older one gotta be the bottom almost everytime?