We build and repair our chassis in shop. They are sevreal reasons for having a nice sharp tungsen.
1.Driver Saftey
2.To have the best penetration and apperence of welds.
3.As for you sharpinging his tungens that meens he didnt have to crawl out every time to sharpen his own. Thus making it more productive.
4.It is his name on the car as the fabricator. If he did sh_tty work that news would travel fast and he would loose alot of clients.