What's pretentious about them? They express a distinctive rhythm in written English. What's the the punctuation you would use instead?
People seem to LOVE parens, although I was taught that they are almost 100% never the correct thing to use in prose. But apparently "some fucker" will accuse me of being pretentious ¯\_(ツ)_/¯
Otherwise, I see people just use a regular dash a lot. I love the em dash myself, but of course stopped using it so I won't get accused of AI (which is sad). It's easy to type, at least on a Mac.
It's like saying I am intimately involved in the printer's art. This is usually not true, unless you're involved with a very niche publisher who still has a box of sorts and inky fingers. Hyphen-minus all the way.