You think to preach the Gospel is to waste time? You think to preach the Gospel is work?
It's only work if you expect to get rewarded for it.
Bible-believing Christians, however, know it is our God-given duty to preach the truth of Christ risen as Christ instructs and the Holy Spirit enables.
"So likewise ye, when ye shall have done all those things which are commanded you, say, We are unprofitable servants: we have done that which was our duty to do." -- Luke 17:10
No, I don't think it's a waste of time. I was, rather, stating where the logic leads, if you insist on a theology which states that "works" have no effect on salvation. Because preaching the Gospel is "a work."
Bible-believing Christians, however, know ....
Are you suggesting, then, that I don't believe the Bible?