I've never seen any research anywhere that suggested genetics for hair coat in cattle came from one parent or the other. While there are some sex-linked genes in cattle (like scurs, for example) I expect hair coat is more akin to hair color and other examples of simple dominance, meaning some coat types might be dominant over others. If I were breeding show cattle and didn't want the type of hair coat this bull has, I probably wouldn't buy him unless somebody could convince me he wouldn't pass that on to his calves. And I don't think anybody could convince me of that.
I've raised Simmental for years, and our cattle traditionally have NOT had a reputation for good hair. Unless they're crossed with other breeds, a lot of Simmental cattle either had slick hair coats, fine, straight hair that laid flat, or curly/wavy hair that's pretty much completely unmanageable. If you REALLY want this bull for other things he brings to the table genetically, you might do a little research of your own and find out more about hair coat genetics. It shouldn't be that hard to find information if it's actually out there somewhere. Unless the bull is some special pedigree or he's a real steel for the price or there's some reason you really want THIS bull, I would think you could find a bull that offers a lot of the same things AND a hair coat that isn't problematic. Just my thoughts on the subject...for whatever they're worth.