So if we used to build a road by having a group of 50 guys with shovels, should we just ignore the invention of the bulldozer so these men don't lose their jobs

So if we used to build a road by having a group of 50 guys with shovels, should we just ignore the invention of the bulldozer so these men don't lose their jobs. 95% of Americans used to work in agriculture. Should we still all be farmers today because if we adapt technology then some of the farmers would lose their job?