If your profile is too long, too drawn out, too obtuse, you’ll lose your reader. Yes, you need to say more than just a few things about yourself, but no one is going to read a really long profile unless its engaging like a novel.
And frankly, that’s not what single sites are set up to do.
I recommend you keep your profile under 500 words ( 300 words is ideal ). If the site allows it, make sure to use bold, italics, bullet points, and lists too. Breaking up the text like this will make it easier to scan (which is most likely what the other person is doing.)