So what if it is faster to do X? I program because I like to. I find it much better than trawling through the net, evaluating a half-dozen alternatives and then cursing as I try to force fit their API into my requirements.
however i'm in Academia and need to program a lot of by myself, cause i should use some non free library ( cause other people wil lnotbe able to modefy this code and etc.
Some businesses may requires "fast" solutions, but I would argue that most businesses would be better off with "the best" solutions. And, in any case, requirements of a certain segment of businesses shouldn't really qualify as "The No #1 Rule Of Programming".