It can't be genetics because most calves are sold into commercial facilities and become "store bought". The vast majority of calves raised by people in this forum end up "store bought".
I guess, based on your post, you haven't ever purchased beef that was so much better than the last beef you purchased that you thought to yourself, "Wow, this was a great __________ (fill in the blank), sure beats the heck out of the last __________(fill in the blank)." That difference would account for the difference in the genetics.
So if it isn't genetics is it feed, if your not giving your steer a nutrionist balanced TMR designed for gain and quality what makes you think you can do better? I would love to know.
Feeding out a steer doesn't require a nutritionist, it simply requires a little education about what makes them tick, what they require as far as basic nutrition is required, what they need to gain, and how to raise them. Can be a little complicated, yes, but it is not brain surgery.
Cattle feeders feed 1000's of cattle out every year and hope to be profitable and the margin they are shooting for is razor thin. What makes people think that they can feed out cattle cheaper and better than the professional buying cattle and feed by the train full?
That would probably have a lot to do with the fact that the everyday cattleman or woman does NOT have 50 steers in one pen fighting for feed and fighting with each other. It is a proven fact that the more muscle is used the tougher the becomes, hence the reason that slaughter bulls and old cows mostly go for hamburger. Your average cattleperson feeding out steers or heifers have one or two in a pen, by themselves, and those steers or heifers know each other so there is no dominance fighting and toughening up of the meat. Add to that the fact that your average cattleman or woman does not have to buy feed the quantities necessary to sustain a feed lot and the choice of feed is, generally speaking, a little more variable.
I really think it comes down to perception and education.
Having eaten beef raised on our property as opposed to eating store bought beef, I think you're dead wrong! I may be dumb, but I'm not stupid and I know the difference in flavor, tenderness, and quality.
I once worked in a custom slaughter facility and have heard it all. People bring in the sorriest creatures ever to have the privlegde of leaving this green (yellow in Texas) earth then turn around and brag up the eating quality of their 9 year old shouldabeenasteer bull...
And this makes you an expert?
Another thing when people say it is so much better what is better? quality grade? tenderness? needle injection sites? carcass age? how are you comparing them?
What is better is the overall flavor, tenderness, eye-appeal and consistency of home-grown beef as opposed to store bought beef.
Don't get me wrong its a good thing to raise your own beef but lets be realistic in our claims.
I would suggest you do a little research on how to feed a critter out, feed one out, slaughter it and do your own comparison. I think you will be very pleased with the results. Just my thoughts.