Some people like to be told what to do without any explanation. Others won't follow through if they don't understand why they're being suggested to this or that. It's very hard to know, from the usual initial post ("My fish are dying!") what the problem may be. My assumption (maybe wrong) is that most people who come here, given the opportunity and clear explanations) want to learn about fishkeeping. Providing an explanation along with a suggestion for action may help a person avoid the same problems in a month, or with their second tank.
As for the barrage of replies asking for water parameters, most LFSs will test for the common water parameters. In some cases, that testing isn't possible or available, and usually we try to help the best we can without that info. But when free testing is available and the poster chooses not to use it, that is a different story, and it is predictive, I think, of the extent to which someone will take care of their fish.
Water quality is pretty important to a fish's health, so knowing a bit about the water helps us figure out what's going on.
Jim
As for the barrage of replies asking for water parameters, most LFSs will test for the common water parameters. In some cases, that testing isn't possible or available, and usually we try to help the best we can without that info. But when free testing is available and the poster chooses not to use it, that is a different story, and it is predictive, I think, of the extent to which someone will take care of their fish.
Water quality is pretty important to a fish's health, so knowing a bit about the water helps us figure out what's going on.
Jim