There are definitely places where even "advanced" pianists may choose to simplify the music for playability. In the Scriabin Fantaisie, for example, my score has an editor's note suggesting that the B could be omitted from a awkward A#-B-D#-A# chord (** mark in m. 110):
Another example in the 1st mvmt of 1. X. 1905: the RH low Db in m. 17 is virtually impossible to play in time with the Ab, but rolling it kind of kills the momentum I want to build during that section. So, I replaced the Db with an Ab:
pseudonym58 it might make sense to not be put off by a higher "official" level rating (within reason).
I would add that on the other side, just because you have the technique to play incredibly difficult pieces doesn't mean you only have to play difficult pieces! It felt a little weird learning Russell's Jamaican Dance No. 2 (an ABRSM Grade 7 piece), let alone programming it into my amateur competition, but there's really no reason I can't just play music I enjoy, and even competitions aren't just technical demonstrations.