Steve obviously did "accidentally borrow" some lyrics from the said song. At the time, Maiden were just another unknown band, borrowing some lyrics from even more unknown band, who were evidently not going to score any success with it (as it was already 10 years old). Steve probably didn't expect to have problems with it 35 years down the road, due to something called the Internet.
But anyway, Steve & company actually did something out of that song, and had (a lot of) success, unlike Beckett, so evidently those lyrics alone were not crucial for Hallowed's success.
Same thing with all those blues songs, which nobody would ever have heard about were it not for Led Zeppelin's first album. They just made it theirs, and that's that