I like the story but I have a slight problem with it. Well not just this manga but others....

i like your thinking, but,, thats up to the author to decide and mangas pairs that switch are hard to sell bc of the binaries that people put on sex (like fem role and male role) and publishing companies cant take the risk
of an unsellable manga bc it takes so long to produce

If you search well you can find a bunch of manga like this , I found four where it's switchable and a lot where the seme looks like an uke and uke look more like a seme just look deeper

Now I agree with your point. I do have to consider the fact that it does take the author a long time to produce their work. But I will say this some stories are becoming too predictable.