Machinist will not build engine unless roller cam is used!

My machinist is one of my closest friends. He's 81 years old and has been a machinist for almost 60 years, and having built many engines for NASCAR teams and drivers that put a lot of big names in the winners circle. He will no longer build a street engine with hydraulic flat tappet cams because of massive numbers of failures. I really can't blame any competent performance engine builder/machinist that takes that stance. He still builds and freshens up a lot of GM crate motors for specific racing classes, like the 601, 602, 604, etc. Those race classes require HFT cams, but all that stuff is a whole different level than the junk Comp has been putting out. I put a Bullet hydraulic roller in my 273 and used Morel Hydraulic roller lifters and couldn't be happier with it. If I'd bought by the cheapest price....it might be a different story!