Meaning if the computer is air gap then this risk doesn't exist
Absolutely. But very few people actually use properly airgapped computers, and if you have the technical knowledge required to properly airgap a device, then you are almost certainly already aware of the risks of printing a seed phrase over hand writing one and how to mitigate against those risks too.
if it is not then storing it in a notepad adds only a small risk on top of already very risky setup.
Also agree, but the risk here is that OP is not generating his seed phrase on his computer at all, but is generating it on a hardware wallet or even a mobile wallet, and then typing it in plain text in to his non-airgapped computer, in which case the additional risk is significant.