Why not buy one decent pen “shell” and then just buy the plastic tube with the tip and the ink afterwards?
I know many companies use pens for marketing but still, they could apply this too and also stand up for the environment while still do marketing.
Unless you’re using the cheapest possible ink and paper with a fat nib, you’re only waiting like 2-3 seconds to be certain it won’t smudge. Even when I’m writing quickly and can’t wait, I haven’t yet smudged from turning a page. TBH I spend way more time waiting for my hand to uncramp because I had to press a ballpoint like a maniac while holding it in a horrible position.
Then I’m guessing you haven’t held a decent fountain pen. Get something cheap like a Jinhao x750 (<5$) and then tell me any disposable ballpoint feels better. And if that doesn’t fit your hand, there’s a wide array of shapes, sizes, and materials.
I’m left handed, anything less than near instantly dry is going to smudge.
They actually make left-handed nibs to alleviate this issue. Fountain pens are truly the S-tier writing tool.