I'm not going to claim I'm an expert on graphic design in print based media, but I get a feeling that there should be more care and time taken when an online cartoonist takes their media to print!

Not to but the blame entirely on cartoonists, printers (or publishers idk) should be showing more print proofs

specifically for color, contrast, and fonts

tl;dr RGB is different than CMYK, fonts that seem like a readable size on digital devices are not necessarily readable in a print format