Sorry, but that isn't something I have any sympathy with at all. I have quite a few things in my life as well as football - and Friday and Saturday nights are when quite a lot of them happen. As it is I make sure that Saturday afternoons and Tuesday evenings are pretty much kept free - especially the former. And many of us still do work 9-5 or so. I am an exile (about 90 minutes away) so getting to the stadium on a Tuesday night in time to get parked up and have something to eat etc before kick off means leaving before 5. That's OK occasionally, but let's not get into evening matches scattered throughout the week.
That may just be 'inconvenience' - but it is *bloody* inconvenient. Once we go down the 'football clubs are just businesses and their supporters are just customers' route, so inconveniencing them (or at worst meaning they simply won't turn up) doesn't matter, then it's a slippery slope. Friday night and Saturday night matches would mean that I couldn't attend a whole heap of them.