I'm not saying that hockey players aren't tougher than basketball players but I understand about the cramp. Senior year in high school I got a cramp during track practice. I tried to just run through it but that led to me pulling my hamstring and I was out for almost two months. On the other side I once got a major calf cramp in the middle of a soccer game same year. I was hobbling for the next five minutes but it dulled to the point where I could walk normally but still feel it. It's up to the player to judge how serious it is.
And don't talk shit about basketball players and injuries. Jordan playing with the flu, Kobe playing with broken fingers, Dejuan Blair has no ligaments left in his knees, Sean Elliott with kidney disease, people play with broken noses all the time (don't say "but they wear a mask" because hockey players do too. I understand why they do because a little rubber puck can do a lot more damage than an elbow but then again an elbow can do some serious damage.) Every sport has their injuries. Hell even golf has gutsy performances (Tiger playing with a bad leg) and people skipping because of injuries (Tiger not playing because of bad leg). Some play through it (Demarcus cousins takes more elbows to the face than anyone I've seen and has spent more time on the court with tissues in his nose than without) and some don't in fear of worsening the injury.
Moral of the story: Don't be an elitist. Different sports, different types of players, If you're so tough then why don't you go play basketball with a calf cramp and tell me how it goes?